Electronic device and control method

Abstract

The present application provides an electronic device and a control method, belonging to the field of electronic technology. The electronic device includes a wireless charging circuit, an antenna module and a matching circuit; the matching circuit includes a first resonant capacitor, a first load modulation capacitor, a second load modulation capacitor and an envelope detection circuit; the wireless charging circuit includes a microcontroller unit, a demodulation circuit, a first half-bridge drive circuit, a second half-bridge drive circuit, a first load modulation circuit and a second load modulation circuit; wherein: the first half-bridge drive circuit is electrically connected to the second half-bridge drive circuit via the antenna module and the first resonant capacitor in sequence; the first load modulation circuit is electrically connected to the antenna module and the envelope detection circuit respectively via the first load modulation capacitor, and the second load modulation circuit is electrically connected to the antenna module, the first resonant capacitor and the envelope detection circuit respectively via the second load modulation capacitor; the envelope detection circuit is also electrically connected to the demodulation circuit.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electronic technology, and in particular, to an electronic device and a control method. Background Art

[0002] 125K low-frequency radio frequency identification (RFID) technology is a near-field communication identification technology with a carrier frequency of 125K-135K Hz. It is widely used in access control due to its low cost and fast identification. Wireless charging technology is a wireless energy transmission technology based on a carrier frequency of 110K-190K Hz. In order to achieve correct energy transmission, it is also accompanied by communication technology.

[0003] In the process of implementing this application, the inventors found that there are at least the following problems in the prior art: the layout area of ​​the RFID circuit is relatively large, however, as users have higher and higher requirements for the portability of electronic devices, the volume of existing electronic devices is getting smaller and smaller, and the space is limited. Therefore, it is difficult to integrate the RFID card reading function into existing electronic devices. Summary of the invention

[0004] The embodiments of the present application provide an electronic device and a control method, which can solve the problem that it is difficult to integrate an RFID card reading function into an electronic device.

[0005] To solve the above problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides an electronic device, including a wireless charging circuit, an antenna module and a matching circuit; the matching circuit includes a first resonant capacitor, a first load modulation capacitor, a second load modulation capacitor and an envelope detection circuit; the wireless charging circuit includes a micro control unit, a demodulation circuit, an H-bridge drive circuit, a first load modulation circuit and a second load modulation circuit; wherein:

[0007] The H-bridge driving circuit includes a first half-bridge driving circuit and a second half-bridge driving circuit, wherein the first ends of the first half-bridge driving circuit and the second half-bridge driving circuit are both electrically connected to the power supply end, and the second ends are both grounded, and the first half-bridge driving circuit is electrically connected to the second half-bridge driving circuit via the antenna module and the first resonant capacitor in sequence, and the H-bridge driving circuit is used to drive the antenna module to operate in a wireless charging transmission mode, a wireless charging receiving mode, an RFID card reading mode, or an RFID card simulation mode;

[0008] The first load modulation circuit is electrically connected to the antenna module and the envelope detection circuit respectively via the first load modulation capacitor, and the second load modulation circuit is electrically connected to the antenna module, the first resonant capacitor and the envelope detection circuit respectively via the second load modulation capacitor; the envelope detection circuit is also electrically connected to the demodulation circuit;

[0009] The micro control unit is electrically connected to the demodulation circuit, the first load modulation circuit, the second load modulation circuit, the first half-bridge driving circuit and the second half-bridge driving circuit respectively.

[0010] In a second aspect, an embodiment of the present application provides a control method, which is applied to the electronic device as described in the first aspect, and the method includes:

[0011] Determine a first operating mode of the electronic device, where the first operating mode is a wireless charging receiving mode, a wireless charging transmitting mode, an RFID card reading mode, or an RFID card emulation mode;

[0012] According to the first working mode, the working state of the electronic device is controlled.

[0013] In the embodiments of the present application, by sharing some hardware, only a small number of components need to be added to enable the electronic device to support the wireless charging receiving function, the wireless charging transmitting function, the RFID card reading function and the RFID card simulation function, thereby enriching the functions of the electronic device without almost affecting the volume of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 It is one of the structural diagrams of the electronic device provided in the embodiment of the present application;

[0016] Figure 2 It is a schematic diagram of signal transmission improved by an embodiment of the present application;

[0017] Figure 3 This is the second structural diagram of the electronic device provided in the embodiment of the present application;

[0018] Figure 4 This is the third structural diagram of the electronic device provided in the embodiment of the present application;

[0019] Figure 5This is the fourth structural diagram of the electronic device provided in the embodiment of the present application;

[0020] Figure 6 This is the fifth structural diagram of the electronic device provided in the embodiment of the present application;

[0021] Figure 7 It is a flow chart of the control method provided in the embodiment of the present application. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0024] The electronic device provided by the embodiment of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0025] In the embodiments of the present application, Figure 1 As shown, the electronic device may include a wireless charging circuit 10 , an antenna module 20 and a matching circuit 30 .

[0026] The matching circuit 30 may include a first resonant capacitor 31, a first load modulation capacitor 32, a second load modulation capacitor 33 and an envelope detection circuit 34. In practical applications, the number of the first resonant capacitor 31, the first load modulation capacitor 32, and the second load modulation capacitor 33 may be one or more, which may be determined according to actual needs, and the embodiment of the present application does not limit this.

[0027] The wireless charging circuit 10 may include a micro control unit 11 , a demodulation circuit 12 , an H-bridge driving circuit 13 , a first load modulation circuit 14 and a second load modulation circuit 15 .

[0028] Furthermore, the H-bridge driving circuit 13 may include a first half-bridge driving circuit 131 and a second half-bridge driving circuit 132. The first ends of the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 are electrically connected to the power supply end (VCC), and the second ends are grounded. The first half-bridge driving circuit 131 is electrically connected to the second half-bridge driving circuit 132 via the antenna module 20 and the first resonant capacitor 31 in sequence.

[0029] The first load modulation circuit 14 is electrically connected to the antenna module 20 and the envelope detection circuit 34 respectively via the first load modulation capacitor 32, and the second load modulation circuit 15 is electrically connected to the antenna module 20, the first resonant capacitor 31 and the envelope detection circuit 34 respectively via the second load modulation capacitor 33; the envelope detection circuit 34 is also electrically connected to the demodulation circuit 12.

[0030] The micro control unit 11 is electrically connected to the demodulation circuit 12 , the first load modulation circuit 14 , the second load modulation circuit 15 , the first half-bridge driving circuit 131 , and the second half-bridge driving circuit 132 , respectively.

[0031] In a specific implementation, the wireless charging circuit 10 may be an integrated circuit (IC). In this case, the wireless charging circuit 10 may be referred to as a wireless charging IC. Of course, in other implementations, the wireless charging circuit 10 may not be integrated, which may be determined according to actual conditions, and the present application embodiment does not limit this.

[0032] The H-bridge drive circuit 13 can be used to drive the antenna module 20 to operate in a wireless charging transmission mode, a wireless charging receiving mode, an RFID card reader mode, or an RFID card simulation mode. In a specific implementation, the antenna module 20 may include at least one coil, and the H-bridge drive circuit 13 can be used to drive some or all of the coils in the antenna module to oscillate, so as to achieve wireless charging, reverse wireless charging, RFID card identification, or RFID card simulation. Therefore, the H-bridge drive circuit may also be referred to as a coil drive circuit or an H-bridge coil drive circuit. In a specific implementation, in one implementation, the H-bridge drive circuit 13 can drive the coil to oscillate through a half-bridge drive circuit, in which case the H-bridge drive circuit 13 can be regarded as being in a half-bridge drive mode. In another implementation, the H-bridge drive circuit 23 can achieve coil drive through two half-bridge drive circuits, in which case the H-bridge drive circuit 23 can be regarded as being in an H-bridge drive mode.

[0033] The first load modulation circuit 14 and the second load modulation circuit 15 can be used for load modulation to perform protocol communication with the wireless charging transmitter device or to send a card number.

[0034] The envelope detection circuit 34 can be used to filter out the carrier and retain the baseband signal. The demodulation circuit 12 can be used to demodulate the baseband signal to obtain the charging power expected by the charging receiving device or the card number of the RFID card. The envelope detection circuit 34 and the demodulation circuit 12 can be used to: determine the transmission power of the antenna module 20, the transmission power is determined based on the charging power expected by the charging receiving device; determine the card number of the RFID card. In an embodiment of the present application, the RFID card can be a physical RFID card or an analog RFID card.

[0035] It can be understood that in addition to the wireless charging circuit 10, the antenna module 20 and the matching circuit 30, the electronic device may also include other components, such as an application processor, which is used to achieve overall control of the electronic device, store the card number, and send the card number via wireless communication or Universal Serial Bus (USB) connection.

[0036] In the embodiment of the present application, the working modes of the electronic device may include: a wireless charging receiving mode, a wireless charging transmitting mode, an RFID card reading mode and an RFID card emulation mode.

[0037] When the electronic device is in the wireless charging receiving mode, the electronic device is equivalent to a wireless charging receiving device and can perform the following operations: implement load modulation through a load modulation circuit to communicate with the wireless charging transmitting device through a protocol; drive the coil in the antenna module to oscillate to achieve a full-bridge rectification effect and realize wireless charging.

[0038] When the electronic device is in the wireless charging transmission mode, the electronic device is equivalent to a wireless charging transmission device and can perform the following operations: drive the coil in the antenna module to achieve reverse wireless charging; determine the transmission power of the antenna module through the envelope detection circuit and the demodulation circuit.

[0039] When the electronic device is in the RFID card reader mode, the electronic device is equivalent to an RFID card reader and can perform the following operations: drive the coil in the antenna module to realize the card reading function; determine the card number of the RFID card through the envelope detection circuit and the demodulation circuit.

[0040] When the electronic device is in the RFID card simulation mode, the electronic device is equivalent to the RFID card and load modulation can be implemented through the load modulation circuit to achieve the sending of the card number.

[0041] For the wireless charging transmission mode (or RFID card reading mode), it can be implemented in the following ways: Figure 2As shown, the H-bridge driving circuit 13 can drive the coil of the antenna module 20 to oscillate, radiate outward, and transmit a carrier signal; after the wireless charging receiving device (or RFID card) receives the carrier signal, it starts load modulation, so that the amplitude of the carrier changes, and a carrier signal with a load modulation signal is formed at one end of the coil close to the resonant capacitor. The carrier with the load modulation signal is transmitted to the envelope detection circuit 34, which filters out the carrier, retains the baseband signal, and transmits the baseband signal to the demodulation circuit 12. The demodulation circuit 12 is used to demodulate the baseband signal to obtain the charging power (or the card number of the RFID card) expected by the charging receiving device.

[0042] It can be seen that in the embodiments of the present application, by sharing some hardware, only a small number of components need to be added to enable the electronic device to support the wireless charging receiving function, the wireless charging transmitting function, the RFID card reading function and the RFID card simulation function, thereby enriching the functions of the electronic device without almost affecting the volume of the electronic device.

[0043] In the embodiment of the present application, the wireless charging receiving mode, the wireless charging transmitting mode, the RFID card reading mode and the RFID card emulation mode can be implemented by sharing at least one of the following: a wireless charging circuit; a coil; a matching circuit. The specific description is as follows:

[0044] Implementation Method 1

[0045] like Figure 3 As shown, optionally, the antenna module 20 may include a radio frequency identification RFID coil 21 and a wireless charging coil 22; the matching circuit may also include a gating switch 35 and a second resonant capacitor 36; wherein:

[0046] A first end of the second resonant capacitor 36 is electrically connected to the first load modulation circuit 14 via the first load modulation capacitor 32, and a second end of the second resonant capacitor 36 is grounded;

[0047] The selection switch 35 is electrically connected to a first point (marked as A in the figure), a second point (marked as B in the figure), an envelope detection circuit 34 and a micro control unit 11 respectively, wherein the first point is a common point between the first resonant capacitor 31 and the second end of the wireless charging coil 22, and the second point is a common point between the first load modulation capacitor 32 and the second resonant capacitor 36;

[0048] The first end of the RFID coil 21 is electrically connected to the first half-bridge driving circuit 131, and the second end of the RFID coil 21 is electrically connected to the second point;

[0049] The first end of the wireless charging coil 22 is electrically connected to the first half-bridge driving circuit 131 , and the second end of the wireless charging coil 22 is electrically connected to the second half-bridge driving circuit 132 via the first resonant capacitor 31 ;

[0050] The second load modulation circuit 15 is electrically connected to the first point via the second load modulation capacitor 33 .

[0051] In this implementation, the first load modulation circuit 14 can be used to implement the sending of the card number. The second load modulation circuit 15 is used to implement protocol communication with the wireless charging transmitter device.

[0052] The RFID coil 21 is used to realize the card number recognition of the RFID card; the wireless charging coil 22 is used to realize wireless charging or reverse wireless charging. Therefore, the second resonant capacitor 36 connected to the RFID coil 21 can be called an RFID resonant capacitor, and the first load modulation capacitor 32 connected to the RFID coil 21 can be called an RFID load modulation capacitor; the first resonant capacitor 31 connected to the wireless charging coil 22 can be called a wireless charging resonant capacitor, and the second load modulation capacitor 33 connected to the wireless charging coil 22 can be called a wireless charging load modulation capacitor.

[0053] The selection switch 35 can conduct the envelope detection circuit 34 and the first point, at which time, the envelope detection circuit 34 and the demodulation circuit 12 are used to determine the charging power expected by the wireless charging receiving device. The selection switch 35 can also conduct the envelope detection circuit 34 and the second point, at which time, the envelope detection circuit 34 and the demodulation circuit 12 are used to determine the card number of the RFID card.

[0054] In the first embodiment, the wireless charging coil 22 and the RFID coil 21 are designed completely independently, the wireless charging circuit is shared, the resonant capacitor and the load modulation capacitor in the matching circuit are designed independently, and the envelope detection circuit 34 is shared by the selection switch 35, so that the electronic device supports the wireless charging receiving function, the wireless charging transmitting function, the RFID card reading function and the RFID card simulation function.

[0055] The following describes the working status of electronic devices in different working modes.

[0056] 1) For wireless charging receiving mode

[0057] In this mode, the electronic device can perform protocol communication with the wireless charging transmitter device through the second load modulation circuit 15, and can drive the wireless charging coil 22 through the H-bridge driving circuit 13 to achieve wireless charging.

[0058] In specific implementation, the electronic device can control the first load modulation circuit 14 to be in an off state to save power. The electronic device can control the second load modulation circuit 15 to be in an on state or an off state alternately according to the first preset frequency to perform protocol communication with the wireless charging transmitter device.

[0059] The H-bridge driving circuit 13 can drive the wireless charging coil 22 to oscillate through the H-bridge driving mode to achieve a full-bridge rectification effect and realize wireless charging.

[0060] During implementation, the microcontroller unit 11 can control the first half-bridge drive circuit 131 and the second half-bridge drive circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency, that is, at the same time, one of the first half-bridge drive circuit 131 and the second half-bridge drive circuit 132 is connected to the power supply terminal but not grounded, and the other half-bridge drive circuit is not connected to the power supply terminal but grounded. For example, the first half-bridge drive circuit 131 can be controlled to connect to the power supply terminal and the second half-bridge drive circuit 132 can be grounded; then, the first half-bridge drive circuit 131 can be controlled to be grounded and the second half-bridge drive circuit 132 can be connected to the power supply terminal.

[0061] When the first half-bridge drive circuit 131 is connected to the power supply end and the second half-bridge drive circuit 132 is grounded, the power supply end of the first half-bridge drive circuit 131, the wireless charging coil 22, the wireless charging resonant capacitor 31 and the ground of the second half-bridge drive circuit 132 form a path, and the current flows from the power supply end connected to the first half-bridge drive circuit 131 to the ground of the second half-bridge drive circuit 132, forming a forward current.

[0062] When the first half-bridge drive circuit 131 is grounded and the second half-bridge drive circuit 132 is connected to the power supply end, the ground of the first half-bridge drive circuit 131, the wireless charging coil 22, the wireless charging resonant capacitor 31 and the power supply end of the second half-bridge drive circuit 132 form a path, and the current flows from the power supply end connected to the second half-bridge drive circuit 132 to the ground of the first half-bridge drive circuit 131, forming a reverse current.

[0063] Since the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 are alternately connected to the power supply terminal and grounded, a reciprocating oscillating current is formed, causing the oscillating voltage of the coil of the wireless charging transmitting device to change, achieving a full-bridge rectification effect and realizing wireless charging.

[0064] 2) For wireless charging transmission mode

[0065] In this mode, the electronic device can drive the wireless charging coil 22 through the H-bridge driving circuit 13 to achieve wireless charging. In specific implementation, the H-bridge driving circuit 13 can drive the wireless charging coil 22 to oscillate through the H-bridge driving mode to achieve reverse wireless charging. In implementation, the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency. For specific implementation, please refer to the above-mentioned related description, which will not be repeated here.

[0066] The selection switch 35 can connect the envelope detection circuit 34 and the first point, so that the envelope detection circuit 34 and the demodulation circuit 12 can obtain the charging power expected by the charging receiving device after demodulating the load modulation signal, and then trigger the electronic device to adjust the transmission power of the antenna module 20.

[0067] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0068] 3) For RFID card reading mode

[0069] In this mode, the electronic device can drive the RFID coil 21 to recognize the card number of the RFID card through the H-bridge driving circuit 13. To avoid interference from the wireless charging coil 22, the electronic device can control the second half-bridge driving circuit 132 to be in a disconnected state, and the H-bridge driving circuit 13 is in a half-bridge driving mode.

[0070] In specific implementation, the micro control unit 11 can control the first half-bridge driving circuit 131 to be connected to the power supply end or to be grounded alternately, that is, at the same time, the first half-bridge driving circuit 131 is connected to the power supply end or to the ground. For example, the first half-bridge driving circuit 131 can be controlled to be connected to the power supply end but not to be grounded; then, the first half-bridge driving circuit 131 can be controlled to be grounded but not to be connected to the power supply end.

[0071] When the first half-bridge driving circuit 131 is connected to the power supply terminal but not to the ground, the power supply ground of the first half-bridge driving circuit 131, the third coil 25, the second resonant capacitor 36 and the ground form a path, and the current flows from the power supply terminal connected to the first half-bridge driving circuit 131 to the ground, forming a forward current.

[0072] When the first half-bridge driving circuit 131 is grounded but not connected to the power supply end, the second resonant capacitor 36, the third coil 25 and the ground of the first half-bridge driving circuit 131 form a path, and the current flows from the second resonant capacitor 36 to the ground of the first half-bridge driving circuit 131, forming a reverse current.

[0073] The gate switch 35 can conduct the envelope detection circuit 34 and the second point. In this case, the envelope detection circuit 34 and the demodulation circuit 12 can obtain the card number of the RFID card after demodulating the load modulation signal.

[0074] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0075] 4) For RFID card emulation mode

[0076] In this mode, the electronic device can send the card number through the first load modulation circuit 14 and the first half-bridge drive circuit 131. To ensure that the RFID coil can form a variable load, the path where the first load modulation circuit 14 and the first half-bridge drive circuit 131 are located can form a loop current or disconnect the current loop. In the circuit path, the path can be disconnected as long as one end is disconnected. Therefore, the card number can be sent through the first load modulation circuit 14 and the first half-bridge drive circuit 131 in the following manner:

[0077] First implementation method: the first load modulation circuit 14 can be controlled to be in the on state according to a preset frequency, and the first half-bridge drive circuit 131 can be grounded; then, the first load modulation circuit 14 can be controlled to be in the off state, and the first half-bridge drive circuit 131 can be disconnected from the ground, and this process can be repeated.

[0078] Second implementation: the first load modulation circuit 14 may be controlled to be in an on state all the time, and the first half-bridge driving circuit 131 may be controlled to be grounded and not grounded alternately according to a preset frequency.

[0079] A third implementation manner: the first half-bridge driving circuit 131 may be controlled to be always in a grounded state, and the first load modulation circuit 14 may be controlled to be alternately turned on or off according to a preset frequency.

[0080] The electronic device can control the second load modulation circuit 15, the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0081] Implementation Method 2

[0082] like Figure 4 As shown, optionally, the antenna module 20 includes a first coil 23, the first coil 23 includes a driving common (COM) terminal, a wireless power charge (Wireless Power Charge, WPC) terminal and an RFID terminal, and the WPC terminal is located between the driving common terminal and the RFID terminal; the matching circuit also includes a gating switch 35, a second resonant capacitor 36 and a first switch 37; wherein:

[0083] A first end of the second resonant capacitor 36 is electrically connected to the first load modulation circuit 14 via the first load modulation capacitor 32, and a second end of the second resonant capacitor 36 is grounded via the first switch 37;

[0084] The selection switch 35 is electrically connected to the first point, the second point, the envelope detection circuit 34 and the micro control unit 11 respectively, the first point is the common point between the first resonant capacitor 31 and the WPC end, and the second point is the common point between the second resonant capacitor 36 and the first load modulation capacitor 32;

[0085] The driving common terminal is electrically connected to the first half-bridge driving circuit 131, the WPC terminal is electrically connected to the second half-bridge driving circuit 132 via the first resonant capacitor 31, and the RFID terminal is electrically connected to the second point;

[0086] The second load modulation circuit 15 is electrically connected to the first point via the second load modulation capacitor 33 .

[0087] In this implementation, the first load modulation circuit 14 can be used to implement the sending of the card number. The second load modulation circuit 15 is used to implement protocol communication with the wireless charging transmitter device.

[0088] The portion between the driving COM end and the WPC end of the first coil 23 can be equivalent to a wireless charging coil, which can be used to realize wireless charging or reverse wireless charging. The portion between the driving COM end and the RFID end of the first coil 23 can be equivalent to an RFID identification coil, which can be used to realize card number recognition of an RFID card. Therefore, the second resonant capacitor 36 connected to the RFID end of the first coil 23 can be called an RFID resonant capacitor, and the first load modulation capacitor 32 connected to the RFID end of the first coil 23 can be called an RFID load modulation capacitor; the first resonant capacitor 31 connected to the WPC end of the first coil 23 can be called a wireless charging resonant capacitor, and the second load modulation capacitor 33 connected to the WPC end of the first coil 23 can be called a wireless charging load modulation capacitor.

[0089] As can be seen from the above content, in order to enable the electronic device to implement the RFID identification technology and the wireless charging technology, the electronic device shares some coils. Since the RFID identification technology and the wireless charging technology share some coils, in order to avoid mutual interference between the wireless charging technology and the RFID identification technology, the second resonant capacitor 36 and the first switch 37 are added.

[0090] In addition, a gating switch 35 is added to enable the envelope detection circuit 34 and the demodulation circuit 12 to respectively demodulate signals under different technologies. In specific implementation, the gating switch 35 can connect the envelope detection circuit 34 and the first point, at which time, the envelope detection circuit 34 and the demodulation circuit 12 are used to determine the charging power expected by the wireless charging receiving device. The gating switch 35 can also connect the envelope detection circuit 34 and the second point, at which time, the envelope detection circuit 34 and the demodulation circuit 12 are used to determine the card number of the RFID card.

[0091] It can be seen that in the second embodiment, by completely sharing the wireless charging circuit and partially sharing the matching circuit and the coil, the electronic device supports the wireless charging transmission mode and the RFID card reading mode.

[0092] The following describes the working status of electronic devices in different working modes.

[0093] 1) For wireless charging receiving mode

[0094] In this mode, the electronic device can perform protocol communication with the wireless charging transmitter device through the second load modulation circuit 15, and can drive the portion between the driving COM terminal and the WPC terminal of the first coil 23 through the H-bridge driving circuit 13 to achieve wireless charging.

[0095] In specific implementation, the electronic device can control the first load modulation circuit 14 to be in an off state to save power. The electronic device can control the second load modulation circuit 15 to be in an on state or an off state alternately according to the first preset frequency to perform protocol communication with the wireless charging transmitter device.

[0096] The H-bridge driving circuit 13 can drive the partial oscillation between the driving COM terminal and the WPC terminal of the first coil 23 through the H-bridge driving mode to achieve a full-bridge rectification effect and realize wireless charging. During implementation, the microcontroller unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency, so that the oscillation voltage of the coil of the wireless charging transmitting device changes, and a full-bridge rectification effect is achieved to realize wireless charging. For specific implementation, please refer to the relevant description in the first embodiment, which will not be repeated here.

[0097] In this embodiment, since the RFID identification technology and the wireless charging technology share some coils, in order to avoid interference from the RFID identification technology, the micro control unit 11 can control the first switch 37 to be in the off state all the time.

[0098] 2) For wireless charging transmission mode

[0099] In this mode, the electronic device can realize wireless charging by driving the portion between the driving COM terminal and the WPC terminal of the first coil 23 through the H-bridge driving circuit 13 .

[0100] In specific implementation, the H-bridge driving circuit 13 can drive the wireless charging coil 22 to oscillate through the H-bridge driving mode to achieve reverse wireless charging. In implementation, the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency. The specific implementation can be referred to the above related description, which will not be repeated here.

[0101] To prevent the portion between the WPC end and the RFID end of the first coil 23 from affecting the wireless charging function, the micro control unit 11 may control the first switch 37 to be turned off.

[0102] The selection switch 35 can connect the envelope detection circuit 34 and the first point, so that the envelope detection circuit 34 and the demodulation circuit 12 can obtain the charging power expected by the charging receiving device after demodulating the load modulation signal, and then trigger the electronic device to adjust the transmission power of the antenna module 20.

[0103] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0104] 3) For RFID card reading mode

[0105] In this mode, the electronic device can realize the card number recognition of the RFID card by driving the portion between the driving COM terminal and the RFID terminal of the first coil 23 through the H-bridge driving circuit 13. To avoid interference from the wireless charging technology, the electronic device can control the second half-bridge driving circuit 132 to be in a disconnected state, and the H-bridge driving circuit 13 is in a half-bridge driving mode.

[0106] In specific implementation, the micro control unit 11 can control the first half-bridge driving circuit 131 to be connected to the power supply terminal or grounded alternately, that is, at the same time, the first half-bridge driving circuit 131 is connected to the power supply terminal or grounded.

[0107] The gate switch 35 can conduct the envelope detection circuit 34 and the second point. In this case, the envelope detection circuit 34 and the demodulation circuit 12 can obtain the card number of the RFID card after demodulating the load modulation signal.

[0108] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0109] 4) For RFID card emulation mode

[0110] In this mode, you can do any of the following:

[0111] Method 1: The electronic device can send the card number through the first load modulation circuit 14 and the first half-bridge driving circuit 131.

[0112] In this way, in order to ensure that the first coil 23 can form a variable load, the path where the first load modulation circuit 14 and the first half-bridge drive circuit 131 are located can form a loop current or disconnect the current loop. In specific implementation, the first load modulation circuit 14 can be controlled to be in an on state and the first half-bridge drive circuit 131 can be grounded; then, the first load modulation circuit 14 can be controlled to be in an off state and / or the first half-bridge drive circuit 131 can be disconnected, and this can be repeated.

[0113] In this manner, the electronic device can control the second load modulation circuit 15 and the second half-bridge driving circuit 132 to be in a disconnected state to save power and avoid interference of the wireless charging function with the RFID card simulation.

[0114] Mode 2: The electronic device can send the card number through the first load modulation circuit 14 and the first switch 37.

[0115] In this way, in order to ensure that the first coil 23 can form a variable load, the path where the first load modulation circuit 14 and the first switch 37 are located can form a loop current or disconnect the current loop. In specific implementation, the first load modulation circuit 14 can be controlled to be in the on state and the first switch 37 can be turned on; then, the first load modulation circuit 14 can be controlled to be in the off state and / or the first switch 37 can be turned off, and this can be repeated.

[0116] In this way, the electronic device can control the second load modulation circuit 15, the first half-bridge driving circuit and the second half-bridge driving circuit 132 to be in a disconnected state to save power and avoid interference of the wireless charging function on the RFID card simulation.

[0117] Mode three: the electronic device can implement the sending of the card number through the first load modulation circuit 14 , the first half-bridge driving circuit 131 , and the first switch 37 .

[0118] In this way, in order to ensure that the first coil 23 can form a variable load, the first load modulation circuit 14 can be controlled to be in the on state, the first half-bridge drive circuit 131 can be grounded, and the first switch 37 can be turned on; then, the first load modulation circuit 14 can be controlled to be in the off state, and / or the first half-bridge drive circuit 131 can be not grounded, and / or the first switch 37 can be turned off, and so on and so forth.

[0119] In this manner, the electronic device can control the second load modulation circuit 15 and the second load modulation circuit 15 to be in a disconnected state to save power and avoid interference of the wireless charging function with the RFID card simulation.

[0120] Implementation Method 3

[0121] like Figure 5 As shown, optionally, the antenna module 20 may include a second coil 24 and a third coil 25; the matching circuit further includes a gating switch 35, a second resonant capacitor 36 and a first switch 37; wherein:

[0122] A first end of the second resonant capacitor 36 is electrically connected to the first load modulation circuit 14 via the first load modulation capacitor 32, and a second end of the second resonant capacitor 36 is grounded via the first switch 37;

[0123] The selection switch 35 is electrically connected to the first point, the second point, the envelope detection circuit 34 and the micro control unit 11 respectively, the first point is the common point between the first resonant capacitor 31 and the second end of the second coil 24, and the second point is the common point between the second resonant capacitor 36 and the first load modulation capacitor 32;

[0124] A first end of the second coil 24 is electrically connected to the first half-bridge driving circuit 131 , and a second end of the second coil 24 is electrically connected to the second half-bridge driving circuit 132 via the first resonant capacitor 31 ;

[0125] A first end of the third coil 25 is electrically connected to the first half-bridge driving circuit 131, and a second end of the third coil 25 is electrically connected to the second point;

[0126] The second load modulation circuit 15 is electrically connected to the first point via the second load modulation capacitor 33 .

[0127] The main difference between the third embodiment and the first embodiment is that the third embodiment adds a first switch 37 relative to the first embodiment, so that the third embodiment can realize independent control of the second coil 24 and the third coil 25. Therefore, in the third embodiment, the four working modes of the electronic device can be realized by a single coil, or by a double coil, which can be determined according to the actual situation, and the embodiment of the present application does not limit this.

[0128] The second coil 24 can be used to: realize wireless charging or reverse wireless charging; and / or realize card number recognition of RFID card. The third coil 25 can be used to: realize wireless charging or reverse wireless charging; and / or realize card number recognition of RFID card.

[0129] The first load modulation circuit 14 can be used to: send the card number; and / or, implement protocol communication with the wireless charging transmitter device. The second load modulation circuit 15 can be used to: send the card number; and / or, implement protocol communication with the wireless charging transmitter device.

[0130] The following describes the working status of electronic devices in different working modes.

[0131] 1) For wireless charging receiving mode

[0132] In this embodiment, the electronic device can be wirelessly charged through the second coil 24 and / or the third coil 25, which are described as follows:

[0133] a) Using the second coil 24 to achieve wireless charging.

[0134] To avoid interference from the third coil 25 , the micro control unit 11 may control the first load modulation circuit 14 to be in a disconnected state and the first switch 37 to be in an off state.

[0135] The microcontroller unit 11 can first control the second load modulation circuit 15 to be in the on state, and the second half-bridge drive circuit 132 to be grounded. Then, the second load modulation circuit 15 is controlled to be in the off state, and the second half-bridge drive circuit 132 is not grounded. The two circuits are alternately controlled to form load modulation, realize protocol communication with the wireless charging transmitter device, and notify the other party of the required charging power.

[0136] The H-bridge driving circuit 13 can drive the second coil 24 to oscillate through the H-bridge driving mode to achieve a full-bridge rectification effect and realize wireless charging. During implementation, the microcontroller unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency, so that the oscillation voltage of the coil of the wireless charging transmitting device changes, and a full-bridge rectification effect is achieved to realize wireless charging. For specific implementation, please refer to the relevant description in the first embodiment, which will not be repeated here.

[0137] b) Using the third coil 25 to achieve wireless charging.

[0138] To avoid interference from the second coil 25 , the micro control unit 11 may control the second half-bridge driving circuit 132 to be in a disconnected state.

[0139] The micro control unit 11 can control the first load modulation circuit 14 and the first switch 37, or control the first load modulation circuit 14 and the first half-bridge driving circuit 131 to form load modulation, thereby realizing protocol communication with the wireless charging transmitting device and notifying the other party of the required charging power.

[0140] When the microcontroller unit 11 forms load modulation by controlling the first load modulation circuit 14 and the first switch 37, the first load modulation circuit 14 can be first controlled to be in the on state and the first switch 37 can be turned on. Then, the first load modulation circuit 14 can be controlled to be in the off state and the first switch 37 can be turned off, and so on alternately.

[0141] When the microcontroller unit 11 forms load modulation by controlling the first load modulation circuit 14 and the first half-bridge drive circuit 131, the first load modulation circuit 14 can be first controlled to be in the on state, and the first half-bridge drive circuit 131 can be grounded. Then, the first load modulation circuit 14 can be controlled to be in the off state, and the first half-bridge drive circuit 131 can be not grounded, and the process can be alternating in this way.

[0142] The H-bridge driving circuit 13 can drive the third coil 25 to oscillate through the first half-bridge driving control circuit 131 to achieve a full-bridge rectification effect and wireless charging. In this case, the H-bridge driving circuit 13 is in a half-bridge driving mode. During implementation, the microcontroller unit 11 can control the first half-bridge driving circuit 131 to alternately connect to the power supply terminal or to ground. For details, please refer to the above-mentioned related description, which will not be repeated here. In addition, when the first half-bridge driving circuit 131 is not grounded, the first switch 37 is controlled to be turned on.

[0143] c) Wireless charging is achieved using the second coil 24 and the third coil 25 .

[0144] In order to make the third coil 25 resonate, the micro control unit 11 can control the first switch 37 to be always in the on state. The micro control unit 11 can control one of the first load modulation circuit 14 and the second load modulation circuit 15 to be regularly turned on or off to form load modulation, realize protocol communication with the wireless charging transmitter device, and notify the other party of the required charging power.

[0145] The H-bridge driving circuit 13 can drive the second coil 24 and the third coil 25 to oscillate through the H-bridge driving mode. In implementation, the microcontroller unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency, so that the oscillation voltage of the coil of the wireless charging transmitter device changes, achieving a full-bridge rectification effect, and realizing wireless charging. For specific implementation, please refer to the relevant description in the first embodiment, which will not be repeated here.

[0146] 2) For wireless charging transmission mode

[0147] In this mode, the envelope detection circuit 34 and the demodulation circuit 12 are used to demodulate the load modulation signal to obtain the charging power expected by the charging receiving device, and then trigger the electronic device to adjust the transmission power of the antenna module 20.

[0148] In this embodiment, the electronic device can be reversely wirelessly charged through the second coil 24 and / or the third coil 25, as described below:

[0149] a) Using the second coil 24 for reverse wireless charging.

[0150] The electronic device can drive the second coil 24 to achieve wireless charging through the H-bridge driving circuit 13. To avoid interference from the third coil 25, the first switch 37 can be controlled to be turned off.

[0151] In specific implementation, the H-bridge driving circuit 13 can drive the wireless charging coil 22 to oscillate through the H-bridge driving mode to achieve reverse wireless charging. In implementation, the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency. The specific implementation can be referred to the above related description, which will not be repeated here.

[0152] The gate switch 35 can conduct electricity between the envelope detection circuit 34 and the first point.

[0153] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0154] b) Using the third coil 25 for reverse wireless charging.

[0155] The electronic device can realize wireless charging by driving the third coil 25 through the H-bridge driving circuit 13. To avoid interference from the second coil 24, the second half-bridge driving circuit 132 can be controlled to be in a disconnected state.

[0156] In specific implementation, the H-bridge driving circuit 13 can drive the third coil 25 to oscillate through the first half-bridge driving control circuit 131. In this case, the H-bridge driving circuit 13 is in a half-bridge driving mode. In implementation, the micro control unit 11 can control the first half-bridge driving circuit 131 to be alternately connected to the power supply terminal or grounded. In addition, when the first half-bridge driving circuit 131 is not grounded, the first switch 37 is controlled to be turned on. Further, the first switch 37 can be controlled to be always in a conducting state.

[0157] The gate switch 35 can conduct electricity between the envelope detection circuit 34 and the second point.

[0158] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0159] c) Reverse wireless charging is performed using the second coil 24 and the third coil 25 .

[0160] To make the third coil 25 resonate, the micro control unit 11 can control the first switch 37 to be always in the on state. The electronic device can drive the third coil 25 and the third coil 25 to achieve wireless charging through the H-bridge driving circuit 13.

[0161] In specific implementation, the H-bridge driving circuit 13 can drive the second coil 24 to oscillate and the third coil 25 through the H-bridge driving mode. In implementation, the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to the power supply terminal and to the ground according to the second preset frequency. For specific implementation, please refer to the above related description, which will not be repeated here.

[0162] The gate switch 35 can alternately connect the envelope detection circuit 34 to the first point or the second point.

[0163] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0164] 3) For RFID card reading mode

[0165] In this mode, the envelope detection circuit 34 and the demodulation circuit 12 can obtain the card number of the RFID card after demodulating the load modulation signal.

[0166] In this embodiment, the electronic device can identify the card number through the second coil 24 and / or the third coil 25, which are described as follows:

[0167] a) Using the second coil 24 to identify the card number.

[0168] To avoid interference from the third coil 25, the first switch 37 can be turned off and the second half-bridge drive circuit 132 can be grounded. In specific implementation, the H-bridge drive circuit 13 can alternately connect the power supply or the ground through the first half-bridge drive circuit 141 to drive the second coil 24 to oscillate.

[0169] The gate switch 35 can conduct electricity between the envelope detection circuit 34 and the first point.

[0170] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0171] b) Using the third coil 25 to identify the card number.

[0172] To avoid interference from the second coil 24, the first switch 37 can be controlled to be turned on and the second half-bridge drive circuit 132 can be turned off. In specific implementation, the H-bridge drive circuit 13 can be alternately connected to the power supply or ground through the first half-bridge drive circuit 141 to drive the third coil 25 to oscillate.

[0173] The gate switch 35 can conduct electricity between the envelope detection circuit 34 and the second point.

[0174] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0175] c) Using the second coil 24 and the third coil 25 to identify the card number.

[0176] To achieve dual-coil driving, the second half-bridge driving circuit 132 can be controlled to be grounded and the first switch 37 can be turned on; the H-bridge driving circuit 13 can be alternately connected to the power supply or the ground through the first half-bridge driving circuit 141 to drive the second coil 24 and the third coil 25 to oscillate.

[0177] The selection switch 35 can alternately turn on the envelope detection circuit 34 and the first point or the second point to achieve time-division data reception.

[0178] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0179] 4) For RFID card emulation mode

[0180] In this mode, the electronic device can perform RFID card simulation through the second coil 24 and / or the third coil 25, which are respectively described as follows:

[0181] a) Using the second coil 24 to perform RFID card emulation.

[0182] In this case, this can be achieved by any of the following methods:

[0183] Method 1: The electronic device can send the card number through the second load modulation circuit 15 and the first half-bridge driving circuit 131.

[0184] In this way, in order to ensure that the second coil 24 can form a variable load, the path where the second load modulation circuit 15 and the first half-bridge drive circuit 131 are located can form a loop current or disconnect the current loop. In specific implementation, the second load modulation circuit 15 can be controlled to be in an on state and the first half-bridge drive circuit 131 can be grounded; then, the second load modulation circuit 15 can be controlled to be in an off state and / or the first half-bridge drive circuit 131 can be disconnected, and this can be repeated.

[0185] In this manner, the electronic device can control the first load modulation circuit 14 and the second half-bridge driving circuit 132 to be in a disconnected state to save power and avoid interference of the wireless charging function with the RFID card simulation.

[0186] Method 2: The electronic device can send the card number through the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132.

[0187] In this way, in order to ensure that the second coil 24 can form a variable load, the path where the first half-bridge drive circuit 131 and the second half-bridge drive circuit 132 are located can form a loop current or disconnect the current loop. In specific implementation, the first half-bridge drive circuit 131 and the second half-bridge drive circuit 132 can be controlled to be grounded first; then, the first half-bridge drive circuit 131 is controlled to be disconnected from the ground, and / or the second half-bridge drive circuit 132 is controlled to be grounded, and this is repeated.

[0188] In this manner, the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0189] Mode three: the electronic device can send the card number through the second load modulation circuit 15 , the first half-bridge driving circuit 131 , and the second half-bridge driving circuit 132 .

[0190] In this way, in order to ensure that the second coil 24 can form a variable load, the second load modulation circuit 15 can be first controlled to be in the on state, the first half-bridge drive circuit 131 is grounded, and the second half-bridge drive circuit 132 is grounded; then, the second load modulation circuit 15 is controlled to be in the off state, and / or the first half-bridge drive circuit 131 is not grounded, and / or the second half-bridge drive circuit 132 is not grounded, and so on and so forth.

[0191] In this manner, the electronic device can control the first load modulation circuit 14 to be in an off state to save power.

[0192] In addition, in the above three implementations, the first switch can be controlled to be turned off to save electricity.

[0193] b) Using the third coil 25 to perform RFID card emulation.

[0194] In this case, this can be achieved by any of the following methods:

[0195] Method 1: The electronic device can send the card number through the first load modulation circuit 14 and the first half-bridge driving circuit 131.

[0196] In this way, in order to ensure that the third coil 25 can form a variable load, the path where the first load modulation circuit 14 and the first half-bridge drive circuit 131 are located can form a loop current or disconnect the current loop. In specific implementation, the first load modulation circuit 14 can be controlled to be in an on state and the first half-bridge drive circuit 131 can be grounded; then, the first load modulation circuit 14 can be controlled to be in an off state and / or the first half-bridge drive circuit 131 can be disconnected, and this can be repeated.

[0197] In this manner, the electronic device can control the second load modulation circuit 15 and the second half-bridge driving circuit 132 to be in a disconnected state to save power.

[0198] Mode 2: The electronic device can send the card number through the first load modulation circuit 14 and the first switch 37.

[0199] In this way, in order to ensure that the third coil 25 can form a variable load, the path where the first load modulation circuit 14 and the first switch 37 are located can form a loop current or disconnect the current loop. In specific implementation, the first load modulation circuit 14 can be controlled to be in an on state and the first switch 37 can be turned on; then, the first load modulation circuit 14 can be controlled to be in an off state and / or the first switch 37 can be turned off, and this can be repeated.

[0200] In this manner, the electronic device can control the second load modulation circuit 15, the first half-bridge driving circuit and the second half-bridge driving circuit 132 to be in a disconnected state to save power.

[0201] Mode three: the electronic device can implement the sending of the card number through the first load modulation circuit 14 , the first half-bridge driving circuit 131 , and the first switch 37 .

[0202] In this way, in order to ensure that the third coil 25 can form a variable load, the first load modulation circuit 14 can be controlled to be in the on state, the first half-bridge drive circuit 131 can be grounded, and the first switch 37 can be turned on; then, the first load modulation circuit 14 can be controlled to be in the off state, and / or the first half-bridge drive circuit 131 can be not grounded, and / or the first switch 37 can be turned off, and so on and so forth.

[0203] In this manner, the electronic device can control the second load modulation circuit 15 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0204] c) Using the second coil 24 and the third coil 25 to perform RFID card emulation.

[0205] In this case, the electronic device can send the card number through the first load modulation circuit 14 , the second load modulation circuit 15 and the first half-bridge driving circuit 131 .

[0206] In specific implementation, the electronic device can first control the first load modulation circuit 14 and the second load modulation circuit 15 to be in the on state, and the first half-bridge drive circuit 131 to be grounded, so as to form a current loop for the second coil 24 and the third coil 26; then, control the first load modulation circuit 14 to be in the off state, and / or the second load modulation circuit 15 to be in the off state, and / or the first half-bridge drive circuit 131 to be not grounded, and repeat this process to remove the load from the access control coil, so as to send the card number.

[0207] The electronic device can control the second half-bridge driving circuit 132 to be in an off state and control the first switch 37 to be off to save electricity.

[0208] Implementation Method 4

[0209] like Figure 6 As shown, optionally, the antenna module 20 may include a fourth coil 26; wherein:

[0210] The first end of the fourth coil 26 is electrically connected to the second half-bridge driving circuit 132 via the first resonant capacitor 31, and the second end of the fourth coil 26 is electrically connected to the first half-bridge driving circuit 131;

[0211] The envelope detection circuit 34 is electrically connected to the first point, which is a common point between the first resonant capacitor 31 and the first end of the fourth coil;

[0212] The first load modulation circuit 14 is electrically connected to the first point via the first load modulation capacitor 32;

[0213] The second load modulation circuit 15 is electrically connected to the first point via the second load modulation capacitor 33 .

[0214] In this embodiment, the fourth coil 26 can be used to: realize wireless charging; realize reverse wireless charging; realize the sending of card number. RFID identification technology and wireless charging technology are realized by the same coil.

[0215] The first load modulation circuit 14 can be used to send the card number. The second load modulation circuit 15 is used to implement protocol communication with the wireless charging transmitter. Therefore, the first load modulation capacitor 32 connected to the first load modulation circuit 14 can be called an RFID load modulation capacitor; the second load modulation capacitor 33 connected to the second load modulation circuit 15 can be called a wireless charging load modulation capacitor.

[0216] It can be seen that in the first embodiment, the wireless charging circuit, coil and matching circuit are completely shared, so that the electronic device supports the RFID identification technology and the wireless charging technology.

[0217] The following describes the working status of electronic devices in different working modes.

[0218] 1) For wireless charging receiving mode

[0219] In this mode, the electronic device can perform protocol communication with the wireless charging transmitter device through the second load modulation circuit 15, and can drive the fourth coil 26 through the H-bridge driving circuit 13 to achieve wireless charging.

[0220] In specific implementation, the electronic device can control the first load modulation circuit 14 to be in an off state to save power. The electronic device can control the second load modulation circuit 15 to be in an on state or an off state alternately according to the first preset frequency to perform protocol communication with the wireless charging transmitter device.

[0221] The H-bridge driving circuit 13 can drive the fourth coil 26 to oscillate in the H-bridge driving mode to achieve a full-bridge rectification effect and realize wireless charging.

[0222] During implementation, the microcontroller unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal at a second preset frequency, which will form a reciprocating oscillating current, so that the oscillating voltage of the coil of the wireless charging transmitter device changes, achieving a full-bridge rectification effect, and realizing wireless charging. For specific implementation, please refer to the above-mentioned related description, which will not be repeated here.

[0223] 2) For wireless charging transmission mode

[0224] In this mode, the electronic device can drive the fourth coil 26 through the H-bridge driving circuit 13 to achieve wireless charging. In specific implementation, the H-bridge driving circuit 13 can drive the wireless charging coil 22 to oscillate through the H-bridge driving mode to achieve reverse wireless charging. In implementation, the micro control unit 11 can control the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 to alternately connect to and ground the power supply terminal according to the second preset frequency. For specific implementation, please refer to the above-mentioned related description, which will not be repeated here.

[0225] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0226] 3) For RFID card reading mode

[0227] In this mode, the electronic device can drive the fourth coil 26 to recognize the card number of the RFID card through the H-bridge driving circuit 13. In specific implementation, the micro control unit 11 can control the first half-bridge driving circuit 131 to be alternately connected to the power supply end or grounded, and control the second half-bridge driving circuit 132 to be grounded to realize the driving of the fourth coil 26.

[0228] The electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0229] 4) For RFID card emulation mode

[0230] In this mode, you can do any of the following:

[0231] Method 1: The electronic device can send the card number through the first load modulation circuit 14 and the first half-bridge driving circuit 131.

[0232] In this way, in order to ensure that the fourth coil 26 can form a variable load, the path where the first load modulation circuit 14 and the first half-bridge drive circuit 131 are located can form a loop current or disconnect the current loop. In specific implementation, the first load modulation circuit 14 can be controlled to be in an on state and the first half-bridge drive circuit 131 can be grounded; then, the first load modulation circuit 14 can be controlled to be in an off state and / or the first half-bridge drive circuit 131 can be disconnected, and this can be repeated.

[0233] In this manner, the electronic device can control the second load modulation circuit 15 and the second half-bridge driving circuit 132 to be in a disconnected state to save power.

[0234] Method 2: The electronic device can send the card number through the second load modulation circuit 15 and the first half-bridge driving circuit 131.

[0235] In this way, in order to ensure that the fourth coil 26 can form a variable load, the path where the second load modulation circuit 15 and the first half-bridge drive circuit 131 are located can form a loop current or disconnect the current loop. In specific implementation, the second load modulation circuit 15 can be controlled to be in an on state and the first half-bridge drive circuit 131 can be grounded; then, the second load modulation circuit 15 can be controlled to be in an off state and / or the first half-bridge drive circuit 131 can be disconnected, and this can be repeated.

[0236] In this manner, the electronic device can control the first load modulation circuit 14 and the second half-bridge driving circuit 132 to be in a disconnected state to save power.

[0237] Method three: the electronic device can send the card number through the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132.

[0238] In this way, in order to ensure that the fourth coil 26 can form a variable load, the path where the first half-bridge drive circuit 131 and the second half-bridge drive circuit 132 are located can form a loop current or disconnect the current loop. In specific implementation, the first half-bridge drive circuit 131 and the second half-bridge drive circuit 132 can be controlled to be grounded first; then, the first half-bridge drive circuit 131 is controlled to be disconnected from the ground, and / or the second half-bridge drive circuit 132 is controlled to be grounded, and this is repeated.

[0239] In this manner, the electronic device can control the first load modulation circuit 14 and the second load modulation circuit 15 to be in a disconnected state to save power.

[0240] Mode 4: The electronic device can send the card number through the first load modulation circuit 14 , the second load modulation circuit 15 , the first half-bridge driving circuit 131 and the second half-bridge driving circuit 132 .

[0241] In this way, in order to ensure that the fourth coil 26 can form a variable load, the first load modulation circuit 14 can be controlled to be in the on state, the second load modulation circuit 15 can be controlled to be in the on state, the first half-bridge drive circuit 131 can be grounded, and the second half-bridge drive circuit 132 can be grounded; then, the first load modulation circuit 14 can be controlled to be in the off state, the second load modulation circuit 15 can be controlled to be in the off state, the first half-bridge drive circuit 131 can be not grounded, and / or the second half-bridge drive circuit 132 can be grounded, and so on and so forth.

[0242] In the embodiments of the present application, Figures 3 to 6 As shown, optionally, the first load modulation circuit 14 includes a first field effect MOS transistor 141, and the second load modulation circuit 15 includes a second MOS transistor 151; wherein:

[0243] The first MOS transistor 141 and the second MOS transistor 151 are N-type MOS transistors;

[0244] The gate of the first MOS transistor 141 is electrically connected to the micro control unit, the drain of the first MOS transistor 141 is electrically connected to the first load modulation capacitor 32, and the source of the first MOS transistor 141 is grounded;

[0245] The gate of the second MOS transistor 151 is electrically connected to the micro control unit, the drain of the second MOS transistor 151 is electrically connected to the second load modulation capacitor 33 , and the source of the second MOS transistor 151 is grounded.

[0246] When the first load modulation circuit 14 is in the on state, the first MOS transistor 141 is turned on. When the first load modulation circuit 14 is in the off state, the first MOS transistor 141 is turned off.

[0247] When the second load modulation circuit 15 is in the on state, the second MOS transistor 151 is turned on. When the second load modulation circuit 15 is in the off state, the second MOS transistor 151 is turned off.

[0248] Optionally, the first half-bridge driving circuit 131 includes a third MOS transistor 1311 and a fourth MOS transistor 1312 , and the second half-bridge driving circuit 132 includes a fifth MOS transistor 1321 and a sixth MOS transistor 1322 ; wherein:

[0249] The third MOS tube 1311 and the fifth MOS tube 1321 are P-type MOS tubes, and the fourth MOS tube 1312 and the sixth MOS tube 1322 are N-type MOS tubes;

[0250] The gates of the third MOS transistor 1311, the fourth MOS transistor 1312, the fifth MOS transistor 1321 and the sixth MOS transistor 1322 are all electrically connected to the micro control unit 11; the sources of the third MOS transistor 1311 and the fifth MOS transistor 1321 are all electrically connected to the power supply terminal; the drain of the third MOS transistor 1311 is electrically connected to the drain of the fourth MOS transistor 1312, and the drain of the fifth MOS transistor 1321 is electrically connected to the drain of the sixth MOS transistor 1322; the sources of the fourth MOS transistor 1312 and the sixth MOS transistor 1322 are all grounded;

[0251] The third point and the fourth point are both electrically connected to the antenna module 20 . The third point is a common point between the drain of the third MOS tube 1311 and the drain of the fourth MOS tube 1312 . The fourth point is a common point between the drain of the fifth MOS tube 1321 and the drain of the sixth MOS tube 1322 .

[0252] When the first half-bridge driving circuit 131 is connected to the power supply terminal but not grounded, the third MOS transistor 1311 can be turned on and the fourth MOS transistor 1312 can be turned off. When the first half-bridge driving circuit 131 is not connected to the power supply terminal but grounded, the third MOS transistor 1311 can be turned off and the fourth MOS transistor 1312 can be turned on. When the first half-bridge driving circuit 131 is in the disconnected state, the third MOS transistor 1311 and the fourth MOS transistor 1312 are turned off.

[0253] When the first half-bridge driving circuit 132 is connected to the power supply terminal but not grounded, the fifth MOS transistor 1321 can be turned on and the sixth MOS transistor 1322 can be turned off. When the first half-bridge driving circuit 132 is not connected to the power supply terminal but grounded, the fifth MOS transistor 1321 can be turned off and the sixth MOS transistor 1322 can be turned on. When the first half-bridge driving circuit 132 is in the disconnected state, the fifth MOS transistor 1321 and the sixth MOS transistor 1322 are turned off.

[0254] It should be noted that, in some implementations, the half-bridge drive circuit may also be formed by other switches, which may be determined according to actual conditions, and the present application embodiment does not limit this. Figure 3 The first switch 37 in the figure is also a MOS tube, but in other implementations, the first switch 37 can also be a switch in other forms, such as a single-pole double-throw switch.

[0255] See also Figure 7 , Figure 7 is a flow chart of the control method provided in the embodiment of the present application. Figure 7 As shown, the control method may include the following steps:

[0256] Step 701: Determine a first operating mode of the electronic device, where the first operating mode is a wireless charging receiving mode, a wireless charging transmitting mode, an RFID card reading mode, or an RFID card emulation mode.

[0257] Step 702: Control the working state of the electronic device according to the first working mode.

[0258] According to the control method of this embodiment, the working modes of the electronic device include a wireless charging receiving mode, a wireless charging transmitting mode, an RFID card reading mode and an RFID card simulation mode, so that the electronic device can realize the wireless charging function, the RFID card reading function and the RFID card simulation function, thereby enriching the functions of the electronic device.

[0259] Optionally, the first load modulation circuit includes the first MOS transistor, and the second load modulation circuit includes the second MOS transistor;

[0260] The first half-bridge driving circuit includes the third MOS transistor and the fourth MOS transistor, and the second half-bridge driving circuit includes the fifth MOS transistor and the sixth MOS transistor.

[0261] Optionally, the first working mode is a wireless charging receiving mode;

[0262] The controlling the working state of the electronic device according to the first working mode includes:

[0263] In the case where the antenna module includes an RFID coil and a wireless charging coil, the first MOS transistor is turned off, the second MOS transistor is turned on or off according to a first preset frequency, and the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency;

[0264] In the case where the antenna module includes a first coil, the first MOS transistor and the first switch are turned off, the second MOS transistor is turned on or off according to a first preset frequency, and the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency;

[0265] In the case where the antenna module includes a second coil and a third coil, the first MOS transistor and the first switch are turned off, the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency, and the working state of the second MOS transistor is controlled to be the same as the working state of the fourth MOS transistor; or, the fifth MOS transistor and the sixth MOS transistor are turned off, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency, and the first switch is controlled to be turned on when the third MOS transistor is turned on, and the working state of the first MOS transistor is controlled to be the same as the working state of the fourth MOS transistor or the first switch; or, the first switch is turned on, the third target MOS transistor is turned on or off according to the first preset frequency, and the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to the second preset frequency;

[0266] In the case where the antenna module includes a fourth coil, the first MOS transistor is turned off, the second MOS transistor is turned on or off according to a first preset frequency, and the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency;

[0267] The first target MOS tube includes the third MOS tube and the sixth MOS tube, the second target MOS tube includes the fourth MOS tube and the fifth MOS tube; the third target MOS tube is the first MOS tube or the second MOS tube.

[0268] Optionally, the first working mode is a wireless charging transmission mode;

[0269] The controlling the working state of the electronic device according to the first working mode includes:

[0270] In the case where the antenna module includes an RFID coil and a wireless charging coil, the first MOS transistor and the second MOS transistor are turned off, the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency, and the gating switch is controlled to turn on the envelope detection circuit and the first point;

[0271] In the case where the antenna module includes a first coil, the first MOS transistor, the second MOS transistor and the first switch are turned off, the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency, and the gating switch is controlled to turn on the envelope detection circuit and the first point;

[0272] In the case where the antenna module includes a second coil and a third coil, the first MOS transistor, the second MOS transistor and the first switch are turned off, the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency, and the gate switch is controlled to turn on the envelope detection circuit and the first point; or, the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the sixth MOS transistor are turned off, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency, the first switch is controlled to be turned on when the third MOS transistor is turned on, and the gate switch is controlled to turn on the envelope detection circuit and the second point; or, the first MOS transistor and the second MOS transistor are turned off, the first switch is turned on, the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency, and the gate switch is controlled to alternately turn on the envelope detection circuit and the first point or the second point;

[0273] In the case where the antenna module includes a fourth coil, the first MOS transistor and the second MOS transistor are turned off, and the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency;

[0274] The first target MOS transistor includes the third MOS transistor and the sixth MOS transistor, and the second target MOS transistor includes the fourth MOS transistor and the fifth MOS transistor.

[0275] Optionally, the first working mode is an RFID card reading mode;

[0276] The controlling the working state of the electronic device according to the first working mode includes:

[0277] In the case where the antenna module includes an RFID coil and a wireless charging coil, the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the sixth MOS transistor are turned off, and the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency;

[0278] In the case where the antenna module includes a first coil, the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the sixth MOS transistor are turned off, the first switch is turned on, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency, and the gating switch is controlled to turn on the envelope detection circuit and the second point;

[0279] In the case where the antenna module includes a second coil and a third coil, the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the first switch are turned off, the sixth MOS transistor is turned on, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency, and the gate switch is controlled to turn on the envelope detection circuit and the first point; or, the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the sixth MOS transistor are turned off, the first switch is turned on, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency, and the gate switch is controlled to turn on the envelope detection circuit and the second point; or, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to the second preset frequency, the sixth MOS transistor and the first switch are turned on, the first MOS transistor, the second MOS transistor and the fifth MOS transistor are turned off, and the gate switch is controlled to alternately turn on the envelope detection circuit and the first point or the second point;

[0280] When the antenna module includes a fourth coil, the first MOS transistor, the second MOS transistor and the fifth MOS transistor are turned off, the sixth MOS transistor is turned on, and the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency.

[0281] Optionally, the first working mode is an RFID card simulation mode;

[0282] The controlling the working state of the electronic device according to the first working mode includes:

[0283] In the case where the antenna module includes an RFID coil and a wireless charging coil, the first MOS transistor and the fourth MOS transistor are alternately turned on or off according to a third preset frequency, and other MOS transistors are turned off; or, the first MOS transistor is kept turned on, and the fourth MOS transistor is alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; or, the fourth MOS transistor is kept turned on, and the first MOS transistor is alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off;

[0284] In the case where the antenna module includes a first coil, the first MOS transistor and the fourth MOS transistor are alternately turned on or off according to a third preset frequency, and other MOS transistors and the first switch are turned off; or, the fourth switch and the first switch are alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; or, the first MOS transistor, the fourth MOS transistor and the first switch are alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off;

[0285] In the case where the antenna module includes a second coil and a third coil, the second MOS transistor and the fourth MOS transistor are alternately turned on and off according to a third preset frequency, and other MOS transistors and the first switch are turned off; or, the fourth MOS transistor and the sixth MOS transistor are alternately turned on and off according to the third preset frequency, and other MOS transistors and the first switch are turned off; or, the second MOS transistor, the fourth MOS transistor and the sixth MOS transistor are alternately turned on and off according to the third preset frequency, and other MOS transistors and the first switch are turned off; or, the first MOS transistor and the fourth MOS transistor are alternately turned on or off according to the third preset frequency, and other MOS transistors and the first switch are turned off; or, the fourth switch and the first switch are alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; or, the first MOS transistor, the fourth MOS transistor and the first switch are alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; or, the first MOS transistor, the fourth MOS transistor and the first switch are alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; or, the first MOS transistor, the second MOS transistor and the fourth MOS transistor are alternately turned on and off according to the third preset frequency, and other MOS transistors and the first switch are turned off;

[0286] In the case where the antenna module includes a fourth coil, the first MOS tube and the fourth MOS tube are alternately turned on and off according to a third preset frequency, and other MOS tubes are turned off; or, the second MOS tube and the sixth MOS tube are alternately turned on and off according to the third preset frequency, and other MOS tubes are turned off; or, the fourth MOS tube and the sixth MOS tube are alternately turned on and off according to the third preset frequency, and other MOS tubes are turned off; or, the first MOS tube, the second MOS tube, the fourth MOS tube and the sixth MOS tube are alternately turned on and off according to the third preset frequency, and other MOS tubes are turned off.

[0287] It should be noted that when the first working mode is a wireless charging receiving mode, a wireless charging transmitting mode, an RFID card reading mode or an RFID card simulation mode, the working status of each component of the electronic device can be referred to the above-mentioned related description and will not be repeated here.

[0288] In the wireless charging receiving mode and the RFID card emulation mode, the gate switch can be in the off state to save power.

[0289] The various optional implementation modes introduced in the embodiments of the present application may be implemented in combination with each other or may be implemented separately if they do not conflict with each other, and the embodiments of the present application are not limited to this.

[0290] For ease of understanding, the following examples are provided:

[0291] Principle of this application: This case uses shared wireless charging IC hardware, modifies the internal software of the wireless charging IC, namely the control logic of the MCU, and adds a 125K low-frequency RFID antenna and its matching path, so that the wireless charging function and the 125K low-frequency access control function can be realized on the premise of a single wireless charging IC.

[0292] Specific innovations:

[0293] (1) Sharing some of the wireless charging circuits to achieve both wireless charging and 125K RFID technology; the shared hardware is not limited to all or part of the IC, antenna, matching circuit, etc.;

[0294] (2) It is possible but not limited to realizing multiple functions through a single IC;

[0295] (3) External shared circuits can be implemented in a variety of ways to improve performance and achieve non-interference;

[0296] The electronic device of the present application mainly includes a wireless charging IC, a wireless charging antenna, and a 125K low-frequency RFID antenna.

[0297] The wireless charging IC drives the wireless charging coil, transmits and receives wireless charging energy, and drives the 125K low-frequency RFID coil and detects and receives signals, realizing the wireless charging and 125K low-frequency RFID functions in a time-sharing or simultaneous manner.

[0298] The wireless charging antenna realizes the transmission and reception of energy and protocol information during wireless charging;

[0299] The 125K low frequency RFID antenna realizes the low frequency RFID function. This antenna may be shared with the wireless charging antenna in some first embodiments.

[0300] The design of this case has multiple embodiments based on the differences in the common parts of its hardware, and when it is in different working modes, it can be realized by turning on, turning off, and periodically turning on and off the MOS tubes of the first MOS tube to the sixth MOS tube. The specific embodiments are as follows:

[0301] In the embodiment of the present application, the antenna, the coil, and the antenna coil can be interchangeable.

[0302] Embodiment 1: The wireless charging IC is shared and the antenna is designed independently.

[0303] like Figure 3 As shown, the wireless charging IC is shared, while the wireless charging antenna, 125K low-frequency RFID antenna, and matching circuit are designed separately.

[0304] Connection method description:

[0305] The first half-bridge driving circuit of the coil driving circuit (i.e., the third MOS tube and the fourth MOS tube) is connected to the common driving terminal of the dual antennas;

[0306] The second half-bridge driving circuit of the coil driving circuit (i.e., the fifth MOS transistor and the sixth MOS transistor) is connected to the other end of the wireless charging antenna through a resonant capacitor, wherein the resonant capacitor may be formed by one or more combinations;

[0307] The first load modulation circuit (i.e., the first MOS tube) is connected to two ends of the 125K antenna through a capacitor;

[0308] The second load modulation circuit (i.e., the second MOS tube) is connected to two ends of the wireless charging antenna through a capacitor;

[0309] The device has four working modes:

[0310] ① Wireless charging receiving mode: The wireless charging antenna senses the voltage and wakes up the wireless charging IC. The wireless charging IC implements load modulation through the "wireless charging load modulation circuit" and completes protocol communication with the wireless charging base to achieve charging.

[0311] MOS tube switching description: the first MOS tube is turned off (because there is no need for 125K card simulation), the second MOS tube is regularly turned on or off (required for the wireless charging protocol communication function), and the third to sixth MOS tubes are regularly turned on and off at the carrier frequency to achieve a full-bridge rectification effect and realize wireless charging.

[0312] ② Reverse wireless charging mode: The coil driving circuit drives the wireless charging antenna to oscillate and emit energy. The corresponding receiving device extracts energy through load modulation, causing the oscillation voltage of the transmitting coil to change. At this time, the "envelope detection circuit" and "internal demodulation circuit" demodulate the load modulation signal and send the corresponding power according to the needs of the other party.

[0313] MOS tube switching instructions: the first MOS tube is turned off (because there is no need for 125K card simulation), the second MOS tube is turned off (not needed for the wireless charging transmitter), the third to sixth MOS tubes are turned on and off regularly at the carrier frequency to drive the coil to achieve reverse wireless charging; the selection switch needs to be switched to the wireless charging end.

[0314] ③125K low-frequency RFID card reading mode: Similar to the aforementioned ② reverse wireless charging mode, the coil driving circuit drives the 125K low-frequency RFID antenna to oscillate. The RFID card tag gets energy and starts when it approaches the coil, and extracts energy through load modulation, causing the oscillation voltage of the transmitting coil to change. At this time, the "envelope detection circuit" and the "internal demodulation circuit" demodulate the load modulation signal and obtain the card number information of the nearby RFID card tag.

[0315] MOS tube switching description: the first MOS, the second MOS, the fifth MOS and the sixth MOS are all turned off, and the third MOS and the fourth MOS are switched on and off at a preset frequency, such as 125KHz or 134.2KHz, to drive the 125K coil; the selection switch needs to be switched to the low-frequency RFID antenna path.

[0316] ④125K low-frequency RFID card simulation mode: When it is detected that it is close to the card reader, the load modulation module inside the wireless charging IC realizes load modulation by turning on and off the "125K low-frequency RFID load modulation circuit" and finally sends the card number.

[0317] There are two ways to realize the RFID coil to draw current to form a load:

[0318] Method 1: Use 125K resonant capacitor and the first MOS tube to realize the current path;

[0319] Method 2: using the first MOS tube and the fourth MOS tube to be turned on at the same time to realize the current path;

[0320] The above-mentioned method 1 or 2 can form a current on the RFID coil or disconnect it from forming a current, thereby changing the load formed on the primary coil (ie, the coil of the card reader) and transmitting data.

[0321] Except for the MOS tubes described in the above methods 1 and 2, other MOS tubes should be in the off state to avoid interference.

[0322] In this case, the first MOS tube and the fourth MOS tube can be turned on to form a current to achieve load removal.

[0323] Embodiment 2: The wireless charging IC is shared, and the wireless charging coil and the RFID coil are partially shared.

[0324] The device is similar to the aforementioned first embodiment and also has four working modes. The difference lies in its special antenna design and the addition of a first switch to control the grounding of the RFID antenna to reduce the impact.

[0325] In the first embodiment, the wireless charging antenna and the RFID antenna are partially shared, which is a hybrid antenna technology. Figure 4As shown. The coil has three taps, namely the dual antenna common drive end, the WPC end, and the RFID end. The dual antenna common drive end is commonly connected to the first half-bridge drive circuit of the wireless charging IC. The WPC end is the middle tap of the coil, which is connected to the second half-bridge drive circuit through the wireless charging resonant capacitor; the RFID end is the end of the hybrid coil, which has the highest inductance and is grounded by the first switch plus the resonant capacitor. This design is similar to the embodiment one, but the coil nesting design allows it to be partially shared, that is, only a part of the coil is used for wireless charging, and the entire coil is used for RFID communication.

[0326] Similar to the first embodiment, the device has four working modes, namely:

[0327] ① Wireless charging receiving mode: The wireless charging antenna senses the voltage and wakes up the wireless charging IC. The wireless charging IC implements load modulation through the "wireless charging communication load modulation control circuit" and completes protocol communication with the wireless charging base to achieve charging.

[0328] MOS tube switching description: the first MOS tube is turned off (because there is no need for 125K card simulation), the first switch is turned off (to avoid the simultaneous resonance of the two coils affecting the wireless charging function), the second MOS tube is regularly turned on or off (required for the wireless charging protocol communication function), and the third to sixth MOS tubes are regularly turned on and off at the carrier frequency to achieve a full-bridge rectification effect and realize wireless charging.

[0329] ② Reverse wireless charging mode: The coil driving circuit drives the wireless charging antenna to oscillate and emit energy. The corresponding receiving device extracts energy through load modulation, causing the oscillation voltage of the transmitting coil to change. At this time, the "envelope detection circuit" and "internal demodulation circuit" demodulate the load modulation signal and send the corresponding power according to the needs of the other party.

[0330] MOS tube switching description: the first MOS tube is turned off (because there is no need for 125K card simulation), the first switch is turned off (to avoid the simultaneous resonance of the two coils affecting the wireless charging function), the selection switch at the front end of the envelope detection circuit is switched to the wireless charging path, the second MOS tube is turned off (not required for the wireless charging transmitter), the third MOS tube to the sixth MOS tube are regularly turned on and off at the carrier frequency to drive the coil to achieve reverse wireless charging; the selection switch control needs to switch the selection switch to the wireless charging path to achieve data reception.

[0331] ③125K low-frequency RFID card reading mode: Similar to the aforementioned ② reverse wireless charging mode, the coil driving circuit drives the 125K low-frequency RFID antenna to oscillate. The RFID card tag gets energy and starts when it approaches the coil, and extracts energy through load modulation, causing the oscillation voltage of the transmitting coil to change. At this time, the "envelope detection circuit" and the "internal demodulation circuit" demodulate the load modulation signal and obtain the card number information of the nearby RFID card tag.

[0332] MOS tube switching description: the first MOS tube, the second MOS tube, the fifth MOS tube and the sixth MOS tube are all turned off, the first switch is turned on, and the third MOS tube and the fourth MOS tube are switched on and off at a frequency of about 125KHz to drive the 125K coil and switch the selection switch of the envelope detection front end to the 125K channel to realize the card reading function; here the selection switch control needs to switch the selection switch to the RFID channel to realize data reception.

[0333] ④125K low-frequency RFID card simulation mode: After detecting the proximity to the card reader, the load modulation module inside the wireless charging IC realizes load modulation by turning on and off the "125K low-frequency RFID load modulation circuit", and finally realizes the sending of the card number. In order to realize the formation of current in the entire coil, there are three ways to achieve it: Method 1, using the MOS first MOS tube and the fourth MOS tube to form a current to achieve load extraction; Method 2: Using the first MOS tube and the first switch to form a current load extraction. Method 3: Using the first MOS tube, the fourth MOS tube and the first switch to form a current load extraction.

[0334] The conduction of the above three modes can control whether current is formed on the coil, that is, a load change is formed on the transmitting primary coil, that is, the coil of the access control device or card reader, to realize data transmission; except for the above-mentioned tubes, other switches, such as MOS tubes and / or the first switch should be in the off state to avoid influence.

[0335] Embodiment 3: Dual-coil antenna design.

[0336] The device is similar to the above-mentioned embodiment 1, with the following main changes:

[0337] The first antenna is completely independent from the second antenna and must be laid out separately;

[0338] Based on the first case, the functions are not differentiated when implemented, and the functions of dual wireless charging antennas, dual RFID antennas, or one RFID antenna and one wireless charging antenna can be realized;

[0339] Compared with the first embodiment, a first switch for determining whether the second antenna resonant capacitor is grounded is added, so that the resonance of the two coils can be independently controlled.

[0340] This device has multiple working modes, namely:

[0341] ① Single-antenna wireless charging receiving mode: The wireless charging antenna senses the voltage to wake up the wireless charging IC. The wireless charging IC implements load modulation through the "wireless charging communication load modulation control circuit" and completes protocol communication with the wireless charging base to achieve charging.

[0342] There are two cases in single antenna reception mode, namely the first antenna or the second antenna.

[0343] When using the first antenna to realize wireless charging, the first switch of the first MOS of the second antenna is first disconnected to avoid interference; tube ④ and the second MOS tube are turned on or off at the same time to form load modulation, notify the other party of the required charging power, and then start to receive energy; when receiving energy, the third MOS tube to the sixth MOS tube are periodically turned on to receive energy.

[0344] When the second antenna realizes wireless charging, the fifth MOS tube and the sixth MOS tube are turned off first to avoid interference with the first antenna; the first MOS tube and the first switch are turned on or off at the same time to form load modulation (similarly, the first MOS tube and the fourth MOS tube can also be turned on and off at the same time) to notify the other party of the required power. In the energy receiving stage, the third MOS tube and the fourth MOS tube are intermittently turned on and off to receive energy. When the third MOS tube is turned on, the first switch is turned on.

[0345] ②Dual-antenna wireless charging receiving mode: The wireless charging antenna senses the voltage to wake up the wireless charging IC. The wireless charging IC implements load modulation through the "wireless charging communication load modulation control circuit" and completes protocol communication with the wireless charging base to achieve charging.

[0346] MOS tube switching description: the first switch is turned on (to achieve resonance of the second antenna), one of the first MOS tube or the second MOS tube is regularly turned on or off (required for the wireless charging protocol communication function), and the third to sixth MOS tubes are regularly turned on and off at the carrier frequency to achieve a full-bridge rectification effect and realize wireless charging.

[0347] ③Single-antenna reverse wireless charging mode: The coil driving circuit drives the wireless charging antenna to oscillate and emit energy. The corresponding receiving device extracts energy through load modulation, causing the oscillation voltage of the transmitting coil to change. At this time, the "envelope detection circuit" and "internal demodulation circuit" demodulate the load modulation signal and send the corresponding power according to the needs of the other party.

[0348] When implemented, the first antenna or the second antenna can be used alone for reverse wireless charging.

[0349] When using the first antenna, the first MOS tube, the second MOS tube and the first switch are turned off, the switch is switched to the first antenna, and the third to sixth MOS tubes drive the first antenna to oscillate. When the power required by the other party is detected, the power can be adjusted by adjusting the duty cycle of the third to sixth MOS tubes to achieve reverse wireless charging.

[0350] When the second antenna is used, the first MOS tube, the second MOS tube, the fifth MOS tube and the sixth MOS tube are turned off to avoid the influence of the first antenna; the selection switch is switched to the second antenna, and the third MOS tube and the fourth MOS tube are indirectly turned on to form a drive. After obtaining the power information required by the other party, the conduction duty cycle of the third MOS tube and the fourth MOS tube is adjusted to adjust the transmission power to achieve wireless charging transmission. When the third MOS tube is turned on, the first switch is turned on.

[0351] ④ Dual-antenna reverse wireless charging mode: The coil drive circuit drives the wireless charging antenna to oscillate and emit energy. The corresponding receiving device extracts energy through load modulation, causing the oscillation voltage of the transmitting coil to change. At this time, the "envelope detection circuit" and "internal demodulation circuit" demodulate the load modulation signal and send the corresponding power according to the needs of the other party.

[0352] MOS tube switching description: the first switch is turned on (to achieve resonance of the second coil), and the selection switch at the front end of the envelope detection circuit is periodically switched to achieve polling reception of data; the first MOS tube and the second MOS tube are turned off (not required for the wireless charging transmitter), the selection switch is periodically switched, and the third MOS tube to the sixth MOS tube are regularly turned on and off at the carrier frequency, and the dual coils are driven at the same time to achieve dual-coil reverse wireless charging. At this time, the receiving device can be a single wireless charging receiving device with dual coils or two wireless charging receiving devices with single coils.

[0353] ⑤125K low-frequency RFID card reading mode: Similar to the aforementioned reverse wireless charging mode, the coil driving circuit drives the antenna to oscillate. The RFID card tag gets energy and starts when it approaches the coil, and extracts energy through load modulation, causing the oscillation voltage of the transmitting coil to change. At this time, the "envelope detection circuit" and the "internal demodulation circuit" demodulate the load modulation signal to obtain the card number information of the nearby RFID card tag.

[0354] The card reading mode here can be divided into single antenna mode or dual antenna mode, which are introduced below:

[0355] First antenna card reading mode: the third MOS tube and the fourth MOS tube are indirectly turned on to drive the first coil, and tube ⑥ is continuously turned on to realize the grounding of the resonant capacitor; the selection switch needs to be switched to the first antenna end to realize data reception; in addition, other MOS tubes and the first switch are in the off state to avoid interference.

[0356] Second antenna card reading mode: the third MOS tube and the fourth MOS tube are indirectly turned on to drive the second coil, and the first switch is continuously turned on to realize the grounding of the resonant capacitor; the selection switch needs to be switched to the second antenna end to realize data reception; in addition, other MOS tubes are in the off state to avoid interference.

[0357] Dual-antenna card reading mode: the third MOS tube and the fourth MOS tube are indirectly turned on to drive the dual coils, the sixth MOS tube and the first switch are continuously turned on to realize the grounding of the resonant capacitor; the selection switch needs to be switched to the first and second antenna ends in turn to realize time-sharing data reception; in addition, other MOS tubes are in the off state to avoid interference.

[0358] ⑥125K low-frequency RFID card simulation mode: When it is detected that it is close to the card reader, the load modulation module inside the wireless charging IC realizes load modulation by turning on and off the "125K low-frequency RFID load modulation circuit" and finally sends the card number.

[0359] The card simulation mode here can be divided into single antenna mode or dual antenna mode, which are introduced below:

[0360] First antenna card simulation mode: There are three modes: Mode 1: Use the second MOS tube and the fourth MOS tube to conduct to form a current to achieve load extraction; Mode 2: Use the fourth MOS tube and the sixth MOS tube to conduct to form a current load extraction. Mode 3: Use the second MOS, the fourth MOS tube and the sixth MOS tube to conduct to form a current load extraction. In addition, other MOS tubes and the first switch should be in the off state.

[0361] Second antenna card simulation mode: There are three modes: Mode 1: Use the first MOS tube and the fourth MOS tube to conduct to form a current to achieve load extraction; Mode 2: Use the fourth MOS tube and the first switch to conduct to form a current load extraction. Mode 3: Use the first MOS, the fourth MOS tube and the first switch to conduct to form a current load extraction. In addition, other MOS should be in the off state.

[0362] Dual-antenna card reading simulation mode: The first MOS tube, the second MOS tube and the fourth MOS tube are indirectly turned on to form a current loop for the first coil and the second coil, to remove the load from the access control coil, and to send the card number; other MOS tubes should be in the off state.

[0363] The above functional modes can be performed simultaneously in a single or multiple combinations; at the same time, different capacitance values ​​can be configured on the resonant capacitors of the first antenna and the second antenna to achieve different resonant frequencies to support wireless charging technologies and standards of multiple frequencies; the modulated load capacitor can be a single or multiple capacitor combinations, or even replaced by a resistor to achieve better effects.

[0364] Embodiment 4: The wireless charging IC is shared and the antenna is completely shared.

[0365] like Figure 6 As shown, the wireless charging IC, antenna and other hardware are shared, and one load modulation capacitor is reserved as a dedicated capacitor path for RFID load modulation.

[0366] Connection method description:

[0367] The first half-bridge driving circuit (the third MOS tube and the fourth MOS tube) is connected to the antenna COM terminal;

[0368] The second half-bridge driving circuit (the fifth MOS transistor and the sixth MOS transistor) is connected to the other end of the antenna through a resonant capacitor, wherein the resonant capacitor may be formed by one or more combinations;

[0369] The first load modulation circuit (i.e., the first MOS tube) is connected to two ends of the antenna through a capacitor;

[0370] The second load modulation circuit (ie the second MOS tube) is connected to two ends of the antenna through a capacitor.

[0371] The device has four working modes:

[0372] ① Wireless charging receiving mode: The wireless charging antenna senses the voltage and wakes up the wireless charging IC. The wireless charging IC implements load modulation through the "wireless charging communication load modulation control circuit" and completes protocol communication with the wireless charging base to achieve charging.

[0373] MOS tube switching description: the first MOS tube is turned off (because there is no need for 125K card simulation), the second MOS tube is regularly turned on or off (required for the wireless charging protocol communication function), and the third to sixth MOS tubes are regularly turned on and off at the carrier frequency to achieve a full-bridge rectification effect and realize wireless charging.

[0374] ② Reverse wireless charging mode: The coil driving circuit drives the wireless charging antenna to oscillate and emit energy. The corresponding receiving device extracts energy through load modulation, causing the oscillation voltage of the transmitting coil to change. At this time, the "envelope detection circuit" and "internal demodulation circuit" demodulate the load modulation signal and send the corresponding power according to the needs of the other party.

[0375] MOS tube switching description: the first MOS tube is turned off (because 125K card simulation is not needed), the second MOS tube is turned off (not needed for the wireless charging transmitter), and the third to sixth MOS tubes are turned on and off regularly at the carrier frequency to drive the coil to achieve reverse wireless charging.

[0376] ③125K low-frequency RFID card reading mode: Similar to the aforementioned ② reverse wireless charging mode, the coil driving circuit drives the 125K low-frequency RFID antenna to oscillate. The RFID card tag gets energy and starts when it approaches the coil, and extracts energy through load modulation, causing the oscillation voltage of the transmitting coil to change. At this time, the "envelope detection circuit" and the "internal demodulation circuit" demodulate the load modulation signal and obtain the card number information of the nearby RFID card tag.

[0377] MOS tube switching description: the first MOS, the second MOS and the fifth MOS are all turned off, the sixth MOS is turned on, and the third MOS and the fourth MOS are switched on and off at a frequency of about 125KHz to drive the coil.

[0378] ④125K low-frequency RFID card simulation mode: When it is detected that it is close to the card reader, the load modulation module inside the wireless charging IC realizes load modulation by turning on and off the "125K low-frequency RFID load modulation circuit" and finally sends the card number.

[0379] There are four methods: Method 1, using the first MOS tube and the fourth MOS tube to conduct to form a current to achieve load extraction; Method 2, using the second MOS tube and the fourth MOS tube to conduct to form a current to achieve load extraction; Method 3: using the fourth MOS tube and the sixth MOS tube to conduct to form a current load extraction. Method 4: using the first MOS tube, the second MOS tube, the fourth MOS tube and the sixth MOS tube to conduct to form a current load extraction.

[0380] Beneficial effects of the present invention:

[0381] 1. By sharing the wireless charging IC hardware, only a small amount of external hardware is needed to realize wireless charging and 125K RFID technology at the same time;

[0382] Second, through corresponding circuit design, two functions can share some hardware without affecting each other;

[0383] 3. Through hybrid antenna design, the antenna volume can be minimized and the cost can be optimized;

[0384] 4. Dual wireless charging mode can be realized to improve charging power and efficiency or charge two devices at the same time.

[0385] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An electronic device, characterized in that: It includes a wireless charging circuit, an antenna module and a matching circuit; the matching circuit includes a first resonant capacitor, a first load modulation capacitor, a second load modulation capacitor and an envelope detection circuit; the wireless charging circuit includes a micro control unit, a demodulation circuit, an H-bridge driving circuit, a first load modulation circuit and a second load modulation circuit; wherein: The H-bridge driving circuit includes a first half-bridge driving circuit and a second half-bridge driving circuit, wherein the first ends of the first half-bridge driving circuit and the second half-bridge driving circuit are both electrically connected to the power supply end, and the second ends are both grounded, and the first half-bridge driving circuit is electrically connected to the second half-bridge driving circuit via the antenna module and the first resonant capacitor in sequence, and the H-bridge driving circuit is used to drive the antenna module to operate in a wireless charging transmission mode, a wireless charging receiving mode, an RFID card reading mode, or an RFID card simulation mode; The first load modulation circuit is electrically connected to the antenna module and the envelope detection circuit respectively via the first load modulation capacitor, and the second load modulation circuit is electrically connected to the antenna module, the first resonant capacitor and the envelope detection circuit respectively via the second load modulation capacitor; the envelope detection circuit is also electrically connected to the demodulation circuit; The micro control unit is electrically connected to the demodulation circuit, the first load modulation circuit, the second load modulation circuit, the first half-bridge driving circuit and the second half-bridge driving circuit respectively.

2. The electronic device according to claim 1, characterized in that: The antenna module includes a radio frequency identification RFID coil and a wireless charging coil; the matching circuit also includes a gating switch and a second resonant capacitor; wherein: The first end of the second resonant capacitor is electrically connected to the first load modulation circuit via the first load modulation capacitor, and the second end of the second resonant capacitor is grounded; The gating switch is electrically connected to a first point, a second point, the envelope detection circuit and the micro control unit respectively, the first point is a common point between the first resonant capacitor and the second end of the wireless charging coil, and the second point is a common point between the first load modulation capacitor and the second resonant capacitor; The first end of the RFID coil is electrically connected to the first half-bridge driving circuit, and the second end of the RFID coil is electrically connected to the second point; The first end of the wireless charging coil is electrically connected to the first half-bridge driving circuit, and the second end of the wireless charging coil is electrically connected to the second half-bridge driving circuit via the first resonant capacitor; The second load modulation circuit is electrically connected to the first point via the second load modulation capacitor.

3. The electronic device according to claim 1, characterized in that: The antenna module includes a first coil, the first coil includes a driving common end, a wireless charging WPC end and an RFID end, and the WPC end is located between the driving common end and the RFID end; the matching circuit also includes a gating switch, a second resonant capacitor and a first switch; wherein: The first end of the second resonant capacitor is electrically connected to the first load modulation circuit via the first load modulation capacitor, and the second end of the second resonant capacitor is grounded via the first switch; The gating switch is electrically connected to a first point, a second point, the envelope detection circuit and the micro control unit respectively, the first point is a common point between the first resonant capacitor and the WPC end, and the second point is a common point between the second resonant capacitor and the first load modulation capacitor; The driving common end is electrically connected to the first half-bridge driving circuit, the WPC end is electrically connected to the second half-bridge driving circuit via the first resonant capacitor, and the RFID end is electrically connected to the second point; The second load modulation circuit is electrically connected to the first point via the second load modulation capacitor.

4. The electronic device according to claim 1, characterized in that: The antenna module includes a second coil and a third coil; the matching circuit also includes a gating switch, a second resonant capacitor and a first switch; wherein: The first end of the second resonant capacitor is electrically connected to the first load modulation circuit via the first load modulation capacitor, and the second end of the second resonant capacitor is grounded via the first switch; The gating switch is electrically connected to a first point, a second point, the envelope detection circuit and the micro control unit respectively, the first point is a common point between the first resonant capacitor and the second end of the second coil, and the second point is a common point between the second resonant capacitor and the first load modulation capacitor; A first end of the second coil is electrically connected to the first half-bridge drive circuit, and a second end of the second coil is electrically connected to the second half-bridge drive circuit via the first resonant capacitor; The first end of the third coil is electrically connected to the first half-bridge driving circuit, and the second end of the third coil is electrically connected to the second point; The second load modulation circuit is electrically connected to the first point via the second load modulation capacitor.

5. The electronic device according to claim 1, characterized in that: The antenna module includes a fourth coil; wherein: The first end of the fourth coil is electrically connected to the second half-bridge drive circuit via the first resonant capacitor, and the second end of the fourth coil is electrically connected to the first half-bridge drive circuit; The envelope detection circuit is electrically connected to a first point, which is a common point between the first resonant capacitor and the first end of the fourth coil; The first load modulation circuit is electrically connected to the first point via the first load modulation capacitor; The second load modulation circuit is electrically connected to the first point via the second load modulation capacitor.

6. The electronic device according to any one of claims 1 to 5, characterized in that: The first load modulation circuit includes a first field effect MOS transistor, and the second load modulation circuit includes a second MOS transistor; wherein: The first MOS tube and the second MOS tube are N-type MOS tubes; The gate of the first MOS transistor is electrically connected to the micro control unit, the drain of the first MOS transistor is electrically connected to the first load modulation capacitor, and the source of the first MOS transistor is grounded; The gate of the second MOS tube is electrically connected to the micro control unit, the drain of the second MOS tube is electrically connected to the second load modulation capacitor, and the source of the second MOS tube is grounded.

7. The electronic device according to any one of claims 1 to 5, characterized in that: The first half-bridge driving circuit includes a third MOS transistor and a fourth MOS transistor, and the second half-bridge driving circuit includes a fifth MOS transistor and a sixth MOS transistor; wherein: The third MOS tube and the fifth MOS tube are P-type MOS tubes, and the fourth MOS tube and the sixth MOS tube are N-type MOS tubes; The gates of the third MOS tube, the fourth MOS tube, the fifth MOS tube and the sixth MOS tube are all electrically connected to the micro control unit; the sources of the third MOS tube and the fifth MOS tube are all electrically connected to the power supply terminal; the drain of the third MOS tube is electrically connected to the drain of the fourth MOS tube, and the drain of the fifth MOS tube is electrically connected to the drain of the sixth MOS tube; the sources of the fourth MOS tube and the sixth MOS tube are both grounded; The third point and the fourth point are both electrically connected to the antenna module, the third point is a common point between the drain of the third MOS tube and the drain of the fourth MOS tube, and the fourth point is a common point between the drain of the fifth MOS tube and the drain of the sixth MOS tube.

8. The electronic device according to any one of claims 1 to 5, characterized in that: The working modes of the electronic device include: wireless charging receiving mode, wireless charging transmitting mode, RFID card reading mode and RFID card emulation mode.

9. The electronic device according to any one of claims 1 to 5, characterized in that: The envelope detection circuit and the demodulation circuit are used to: determine the transmission power of the antenna module; and determine the card number of the RFID card.

10. A control method, characterized in that: Applied to the electronic device according to any one of claims 1 to 9, the method comprises: Determine a first operating mode of the electronic device, where the first operating mode is a wireless charging receiving mode, a wireless charging transmitting mode, an RFID card reading mode, or an RFID card emulation mode; According to the first working mode, the working state of the electronic device is controlled.

11. The method according to claim 10, characterized in that The first load modulation circuit includes a first MOS transistor, and the second load modulation circuit includes a second MOS transistor; The first half-bridge driving circuit includes a third MOS transistor and a fourth MOS transistor, and the second half-bridge driving circuit includes a fifth MOS transistor and a sixth MOS transistor.

12. The method according to claim 11, characterized in that The first working mode is a wireless charging receiving mode; The controlling the working state of the electronic device according to the first working mode includes: In the case where the antenna module includes an RFID coil and a wireless charging coil, the first MOS transistor is turned off, the second MOS transistor is turned on or off according to a first preset frequency, and the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency; In the case where the antenna module includes a first coil, the first MOS transistor and the first switch are turned off, the second MOS transistor is turned on or off according to a first preset frequency, and the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency; In the case where the antenna module includes a second coil and a third coil, the first MOS transistor and the first switch are turned off, the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency, and the working state of the second MOS transistor is controlled to be the same as the working state of the fourth MOS transistor; or, the fifth MOS transistor and the sixth MOS transistor are turned off, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency, and the first switch is controlled to be turned on when the third MOS transistor is turned on, and the working state of the first MOS transistor is controlled to be the same as the working state of the fourth MOS transistor or the first switch; or, the first switch is turned on, the third target MOS transistor is turned on or off according to the first preset frequency, and the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to the second preset frequency; In the case where the antenna module includes a fourth coil, the first MOS transistor is turned off, the second MOS transistor is turned on or off according to a first preset frequency, and the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency; The first target MOS tube includes the third MOS tube and the sixth MOS tube, the second target MOS tube includes the fourth MOS tube and the fifth MOS tube; the third target MOS tube is the first MOS tube or the second MOS tube.

13. The method according to claim 11, characterized in that The first working mode is a wireless charging transmission mode; The controlling the working state of the electronic device according to the first working mode includes: In the case where the antenna module includes an RFID coil and a wireless charging coil, the first MOS transistor and the second MOS transistor are turned off, the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency, and the gate switch is controlled to turn on the envelope detection circuit and the first point; In the case where the antenna module includes a first coil, the first MOS transistor, the second MOS transistor and the first switch are turned off, the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency, and the gating switch is controlled to turn on the envelope detection circuit and the first point; In the case where the antenna module includes a second coil and a third coil, the first MOS transistor, the second MOS transistor and the first switch are turned off, the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency, and the gate switch is controlled to turn on the envelope detection circuit and the first point; or, the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the sixth MOS transistor are turned off, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency, the first switch is controlled to be turned on when the third MOS transistor is turned on, and the gate switch is controlled to turn on the envelope detection circuit and the second point; or, the first MOS transistor and the second MOS transistor are turned off, the first switch is turned on, the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency, and the gate switch is controlled to alternately turn on the envelope detection circuit and the first point or the second point; In the case where the antenna module includes a fourth coil, the first MOS transistor and the second MOS transistor are turned off, and the first target MOS transistor and the second target MOS transistor are alternately turned on and off according to a second preset frequency; The first target MOS transistor includes the third MOS transistor and the sixth MOS transistor, and the second target MOS transistor includes the fourth MOS transistor and the fifth MOS transistor.

14. The method according to claim 11, characterized in that The first working mode is an RFID card reading mode; The controlling the working state of the electronic device according to the first working mode includes: In the case where the antenna module includes an RFID coil and a wireless charging coil, the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the sixth MOS transistor are turned off, and the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency; In the case where the antenna module includes a first coil, the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the sixth MOS transistor are turned off, the first switch is turned on, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency, and the gating switch is controlled to turn on the envelope detection circuit and the second point; In the case where the antenna module includes a second coil and a third coil, the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the first switch are turned off, the sixth MOS transistor is turned on, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency, and the gate switch is controlled to turn on the envelope detection circuit and the first point; or, the first MOS transistor, the second MOS transistor, the fifth MOS transistor and the sixth MOS transistor are turned off, the first switch is turned on, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency, and the gate switch is controlled to turn on the envelope detection circuit and the second point; or, the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to the second preset frequency, the sixth MOS transistor and the first switch are turned on, the first MOS transistor, the second MOS transistor and the fifth MOS transistor are turned off, and the gate switch is controlled to alternately turn on the envelope detection circuit and the first point or the second point; When the antenna module includes a fourth coil, the first MOS transistor, the second MOS transistor and the fifth MOS transistor are turned off, the sixth MOS transistor is turned on, and the third MOS transistor and the fourth MOS transistor are alternately turned on and off according to a second preset frequency.

15. The method according to claim 11, characterized in that The first working mode is an RFID card simulation mode; The controlling the working state of the electronic device according to the first working mode includes: In the case where the antenna module includes an RFID coil and a wireless charging coil, the first MOS transistor and the fourth MOS transistor are alternately turned on or off according to a third preset frequency, and other MOS transistors are turned off; or, the first MOS transistor is kept turned on, and the fourth MOS transistor is alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; or, the fourth MOS transistor is kept turned on, and the first MOS transistor is alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; In the case where the antenna module includes a first coil, the first MOS transistor and the fourth MOS transistor are alternately turned on or off according to a third preset frequency, and other MOS transistors and the first switch are turned off; or, the fourth switch and the first switch are alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; or, the first MOS transistor, the fourth MOS transistor and the first switch are alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; In the case where the antenna module includes a second coil and a third coil, the second MOS transistor and the fourth MOS transistor are alternately turned on and off according to a third preset frequency, and other MOS transistors and the first switch are turned off; or, the fourth MOS transistor and the sixth MOS transistor are alternately turned on and off according to the third preset frequency, and other MOS transistors and the first switch are turned off; or, the second MOS transistor, the fourth MOS transistor and the sixth MOS transistor are alternately turned on and off according to the third preset frequency, and other MOS transistors and the first switch are turned off; or, the first MOS transistor and the fourth MOS transistor are alternately turned on or off according to the third preset frequency, and other MOS transistors and the first switch are turned off; or, the fourth switch and the first switch are alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; or, the first MOS transistor, the fourth MOS transistor and the first switch are alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; or, the first MOS transistor, the fourth MOS transistor and the first switch are alternately turned on or off according to the third preset frequency, and other MOS transistors are turned off; or, the first MOS transistor, the second MOS transistor and the fourth MOS transistor are alternately turned on and off according to the third preset frequency, and other MOS transistors and the first switch are turned off; In the case where the antenna module includes a fourth coil, the first MOS tube and the fourth MOS tube are alternately turned on and off according to a third preset frequency, and other MOS tubes are turned off; or, the second MOS tube and the sixth MOS tube are alternately turned on and off according to the third preset frequency, and other MOS tubes are turned off; or, the fourth MOS tube and the sixth MOS tube are alternately turned on and off according to the third preset frequency, and other MOS tubes are turned off; or, the first MOS tube, the second MOS tube, the fourth MOS tube and the sixth MOS tube are alternately turned on and off according to the third preset frequency, and other MOS tubes are turned off.

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