Control circuit and control method

Abstract

The invention discloses a control circuit and a control method, and a control module in the control circuit is connected with a second radio frequency module, a first radio frequency module and a signal receiving and transmitting module, and is used for transmitting a first radio frequency signal sent by the signal receiving and transmitting module to the first radio frequency module; the control module is also used for detecting the second radio frequency power of the second radio frequency module and determining the working state of the second radio frequency module based on the second radio frequency power; if the second radio frequency module is in the first state, the first radio frequency signal is controlled to be transmitted to the first radio frequency module through the first path so as to be transmitted through the first power; if the second radio frequency module is in the second state, controlling to transmit the first radio frequency signal to the first radio frequency module through a second path so as to send the first radio frequency signal through second power; wherein the signal transceiving module transmits a first radio frequency signal with a fixed size, and the first size of the first radio frequency signal received by the first radio frequency module through the first path is different from the second size of the first radio frequency signal received through the second path.

Description

Technical Field

[0001] The present application relates to the field of radio frequency control technology, and in particular to a control circuit and a control method. Background Art

[0002] Excessive electromagnetic radiation from wireless communication terminals will have a certain impact on human health. Long-term exposure to electromagnetic radiation will cause people to feel physical fatigue, eye fatigue, shoulder pain, headache, anxiety, etc. Therefore, portable terminals need to complete SAR testing before they are put on the market and meet the SAR limit.

[0003] Currently, a SAR sensor is used to detect whether a human body is in contact with an electronic device such as a tablet or a mobile phone. After detecting that a human body is in contact with the electronic device, for example, the transmission power of WIFI or cellular is reduced to meet the SAR limit requirement, but the transmission power of another RF signal cannot be adjusted. For example, in the scenario of WIFI signals and Bluetooth signals, in order to ensure that the WIFI signal can meet the SAR limit requirement, the transmission power of another signal, such as the Bluetooth signal, needs to be set to the minimum value that can meet the SAR limit requirement. This results in the power of the other RF signal emitted by the electronic device being relatively small, affecting the signal quality. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a control circuit and a control method.

[0005] In a first aspect, an embodiment of the present application provides a control circuit, including a signal transceiver module, a control module, a first radio frequency module, and a second radio frequency module;

[0006] The control module is connected to the second radio frequency module;

[0007] The control module is connected to the first RF module and the signal transceiver module, and is used to transmit the first RF signal sent by the signal transceiver module to the first RF module;

[0008] The control module is also used for:

[0009] detecting a second radio frequency power of the second radio frequency module, and determining a working state of the second radio frequency module based on the second radio frequency power;

[0010] If the second RF module is in a first state, controlling the first RF signal to be transmitted to the first RF module through a first path so as to be sent at a first power;

[0011] If the second RF module is in a second state, controlling the first RF signal to be transmitted to the first RF module through a second path so as to be sent at a second power;

[0012] The signal transceiver module sends the first RF signal of the fixed size, and a first size of the first RF signal received by the first RF module through the first path is different from a second size of the first RF signal received through the second path.

[0013] In a possible implementation, a T-type attenuation network or a π-type attenuation network is provided in the first path, the first RF module maintains a fixed power amplification gain in the first state and the second state, the first size of the first RF signal is smaller than the second size of the first RF signal, and the first power is smaller than the second power.

[0014] In one possible implementation,

[0015] The signal transceiver module is also used to transmit a second RF signal to the second RF module, wherein when the second RF module is in the first state, the second RF signal sent by the second RF module has a third power, and when the second RF module is in the second state, the second RF signal sent by the second RF module has a fourth power, the third power is less than the fourth power, the fourth power and the third power have a second difference, the first power and the second power have a first difference, and the first difference and the second difference are less than a preset threshold.

[0016] In a possible implementation manner, the control module is further used for:

[0017] If the second RF module is in a third state, control the transmission of the first RF signal to the first RF module through a second path to be sent at a second power; wherein the third state represents that the second RF module is in a working state where it does not transmit signals.

[0018] In a possible implementation, the control module includes a converter and a comparator;

[0019] The converter is used to detect the second RF power of the second RF module to determine the corresponding working voltage, and the comparator is used to compare the working voltage with the first reference voltage and the working voltage with the second reference voltage. If the working voltage is greater than or equal to the first reference voltage, and the working voltage is less than the second reference voltage, it is determined that the second RF module is in the first state, and the first state indicates that the electronic device is in a state where a human body is approaching; if the working voltage is greater than the second reference voltage, it is determined that the second RF module is in the second state, and the second state indicates that there is no human body approaching the electronic device; if the working voltage is less than the first reference voltage, it is determined that the second RF module is in the third state; or,

[0020] The comparator is used to compare the working voltage with the first reference voltage. If the working voltage is greater than or equal to the first reference voltage, it is determined that the second RF module is in the fourth state, and the fourth state indicates that the second RF module is in a working state of transmitting signals; if the working voltage is less than the first reference voltage, it is determined that the second RF module is in the third state;

[0021] The first reference voltage is smaller than the second reference voltage.

[0022] In a possible implementation manner, the signal transceiver module is further used to obtain a state of a trigger sensor, and the trigger sensor is used to detect whether the electronic device is in a human body proximity state;

[0023] When the trigger sensor detects that the electronic device is in a human body proximity state, the second radio frequency signal sent by the signal transceiver module has the third power;

[0024] When the trigger sensor detects that the electronic device is in a state where no human body is approaching, the signal transceiver module sends the second radio frequency signal with the fourth power.

[0025] In a possible implementation, the control circuit further includes a combiner, which is connected to the second RF module, the first RF module, and the antenna; the first RF signal is a Bluetooth signal, and the second RF signal is a Wi-Fi 5G signal; the combiner sends an RF signal to the antenna according to the power sum of the second RF module and the first RF module.

[0026] In a second aspect, an embodiment of the present application further provides a control method, using a control circuit, wherein the control circuit includes a signal transceiver module, a control module, a first radio frequency module, and a second radio frequency module;

[0027] The control module is connected to the second radio frequency module;

[0028] The control module is connected to the first RF module and the signal transceiver module, and is used to transmit the first RF signal sent by the signal transceiver module to the first RF module;

[0029] The control method comprises:

[0030] Obtaining a second radio frequency power of a second radio frequency module;

[0031] Based on the second radio frequency power, determining a working state of the second radio frequency module;

[0032] If the second RF module is in a first state, controlling the first RF signal to be transmitted to the first RF module through a first path so as to be sent at a first power;

[0033] If the second RF module is in a second state, controlling the first RF signal to be transmitted to the first RF module through a second path so as to be sent at a second power;

[0034] The signal transceiver module sends the first RF signal of the fixed size, and a first size of the first RF signal received by the first RF module through the first path is different from a second size of the first RF signal received through the second path.

[0035] In a possible implementation, the control method includes:

[0036] If the second RF module is in a third state, control the transmission of the first RF signal to the first RF module through a second path to be sent at a second power; wherein the third state represents that the second RF module is in a working state where it does not transmit signals.

[0037] In a possible implementation manner, determining the working state of the second RF module based on the second RF power includes:

[0038] Based on the second radio frequency power, determining a corresponding operating voltage;

[0039] Compare the operating voltage with a first reference voltage and compare the operating voltage with a second reference voltage. If the operating voltage is greater than or equal to the first reference voltage and the operating voltage is less than the second reference voltage, determine that the second RF module is in the first state, and the first state indicates that the electronic device is in a state where a human body is approaching; if the operating voltage is greater than the second reference voltage, determine that the second RF module is in the second state, and the second state indicates that no human body is approaching the electronic device; if the operating voltage is less than the first reference voltage, determine that the second RF module is in the third state; or,

[0040] Comparing the operating voltage with the first reference voltage, if the operating voltage is greater than or equal to the first reference voltage, determining that the second RF module is in the fourth state, the fourth state indicating that the second RF module is in a working state of transmitting signals; if the operating voltage is less than the first reference voltage, determining that the second RF module is in the third state;

[0041] The first reference voltage is smaller than the second reference voltage.

[0042] The control circuit of the embodiment of the present application uses a control module to control the transmission of the first RF signal to the first RF module through the first path or the second path based on the working state of the second RF module, and the first size of the first RF signal received by the first RF module through the first path is different from the second size of the first RF signal received through the second path, that is, the first path and the second path can make the first RF module send the first RF signal with different powers, thereby changing the size of the first RF signal, avoiding the problem that the signal quality is affected by the signal transceiver module being able to only send the first RF signal of a fixed size, that is, for different working states of the second RF module, it is possible to ensure that the first RF signal is not affected while meeting the SAR limit requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0044] Figure 1 A schematic diagram of a control circuit provided by the present application is shown;

[0045] Figure 2 A circuit diagram of a control module provided by the present application is shown;

[0046] Figure 3 A flow chart of a control method provided by the present application is shown.

[0047] Reference numerals

[0048] 1-transceiver module; 2-control module; 3-first RF module; 4-second RF module; 5-combiner; 21-converter; 22-comparator; 221-first voltage comparator; 222-second voltage comparator; 23-XOR circuit; 24-first logic switch; 25-second logic switch. DETAILED DESCRIPTION

[0049] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0050] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0051] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0052] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0053] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0054] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0055] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0056] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0057] To facilitate understanding of the present application, a control circuit provided by the present application is first introduced in detail.

[0058] Figure 1 shows a schematic diagram of the control circuit, refer to Figure 1 It can be seen that the control circuit of the embodiment of the present application includes a signal transceiver module 1, a control module 2, a first RF module 3 and a second RF module 4. Among them, the control module 2 is connected to the second RF module 4, and is used to detect the second RF power of the second RF module 4; and the control module 2 is connected to the first RF module 3 and the signal transceiver module 1, and is used to transmit the first RF signal sent by the signal transceiver module 1 to the first RF module 3.

[0059] Since the current technology can only send Bluetooth signals with fixed power, this application is elaborated in detail with the first RF signal being a Bluetooth signal and the second RF signal being a Wi-Fi 5G signal. That is to say, the size of the first RF signal sent by the signal transceiver module 1 in the embodiment of the present application is fixed.

[0060] Reference Figure 1 In the example shown, the signal transceiver module 1 is set as a Wi-Fi Chip, which is provided with a BT In port, a Wi-Fi 2.4G In port, and a Wi-Fi 5G In port, so as to send a Bluetooth RF signal through the BT In port, send a Wi-Fi 2.4G RF signal through the Wi-Fi 2.4G In port, and send a Wi-Fi 5G RF signal through the Wi-Fi 5G In port. Correspondingly, the control module 2 receives the Bluetooth RF signal, that is, the first RF signal, sent by the signal transceiver module 1 through the RF In port, and transmits the first RF signal to the first RF module 3 through the RF1 port or the RF2 port. Of course, Figure 1 This is just an example. In actual applications, the signal transceiver module 1 can be set to other control chips as long as it can send radio frequency signals to enable the electronic device to communicate with the outside world.

[0061] In a specific implementation, the control circuit is set in any electronic device that can communicate with the outside world, such as a mobile phone, a tablet computer, etc. When the electronic device communicates with the outside world, the control module 2 detects the second RF power of the second RF module 4, and determines the working state of the second RF module 4 based on the second RF power. Among them, the different working states of the second RF module 4 correspond to the different powers of the second RF signal sent by the second RF module 4. The working state of the second RF module 4 can characterize whether it transmits a signal, whether there is a human body approaching the electronic device to which the control circuit belongs, etc.

[0062] It should be noted that the first RF module 3 and the second RF module 4 in the embodiment of the present application at least integrate a power amplifier, a RF switch, a low noise amplifier, etc., so as to realize functions such as power amplification, signal transmission, and noise reduction. Figure 1 In the example shown, the first RF module 3 is used to receive and process the Bluetooth RF signal and the Wi-Fi 2.4G RF signal sent by the signal transceiver module 1, and the second RF module 4 is used to receive and process the Wi-Fi 5G RF signal sent by the signal transceiver module 1. Of course, the first RF module 3 can also be set to receive and process the Bluetooth RF signal sent by the signal transceiver module 1, that is, the first RF signal, and the third RF module can be set to receive and process the Wi-Fi 2.4G RF signal sent by the signal transceiver module 1. This embodiment of the present application does not specifically limit this.

[0063] In one example, if the second RF module 4 is in the first state, the control module 2 controls the transmission of the first RF signal to the first RF module 3 through the first path, so that the first RF module 3 sends the first RF signal through the first power; if the second RF module 4 is in the second state, the control module 2 controls the transmission of the first RF signal to the first RF module 3 through the second path, so that the first RF module 3 sends the first RF signal through the second power. The first size of the first RF signal received by the first RF module 3 through the first path is different from the second size of the first RF signal received through the second path, that is, the first power is different from the second power.

[0064] Continue to refer to Figure 1 , the first path is the path corresponding to the RF1 port, and the second path is the path corresponding to the RF2 port. A T-type attenuation network or a π-type attenuation network is provided in the first path, and the T-type attenuation network or the π-type attenuation network includes one or more resistor devices and is used to reduce the fixed power of the first RF signal sent by the signal transceiver module 1.

[0065] In another example, the first RF module 3 maintains a fixed power amplification gain in the first state and the second state, that is, the amplification gain of the first RF module 3 for the fixed power remains unchanged. On the basis that the first path is used to reduce the fixed power of the first RF signal sent by the signal transceiver module 1, the first size of the first RF signal received by the first RF module 3 through the first path is smaller than the second size of the first RF signal received through the second path, and accordingly, the first power is smaller than the second power. Here, the embodiment of the present application changes the power when the first RF module 3 sends the first RF signal through a T-type attenuation network or a π-type attenuation network set in the first path, that is, changes the size of the first RF signal, thereby effectively avoiding the problem that the signal transceiver module 1 can only send the first RF signal at a fixed power, which causes the SAR limit requirement to be unable to be met and / or the signal quality of the first RF signal to be affected.

[0066] In another example, the signal transceiver module 1 is also used to transmit a second RF signal to the second RF module 4, wherein when the second RF module 4 is in the first state, the second RF signal sent by the second RF module 4 has a third power, and when the second RF module 4 is in the second state, the second RF signal sent by the second RF module 4 has a fourth power.

[0067] Optionally, a trigger sensor may also be provided on the electronic device to which the signal transceiver module 1 belongs, and the signal transceiver module 1 is communicatively connected with the trigger sensor, that is, the signal transceiver module 1 and the trigger sensor can communicate to transmit data, signals, etc. In this scenario, the signal transceiver module 1 is also used to obtain the state of the trigger sensor, wherein the trigger sensor is used to detect whether the electronic device is in a state of human proximity, that is, the state of the trigger sensor can characterize that the electronic device is in a state of human proximity or that the electronic device is in a state of no human proximity. Here, the trigger sensor can be set as a capacitive sensor, etc., as long as it can detect the proximity to the human body.

[0068] For example, when the trigger sensor detects that the electronic device is in a human proximity state, the second radio frequency signal sent by the signal transceiver module 1 has a third power; when the trigger sensor detects that the electronic device is in a human proximity state, the second radio frequency signal sent by the signal transceiver module 1 has a fourth power. The third power is less than the fourth power.

[0069] That is to say, when the trigger sensor detects that there is a human body approaching the electronic device or there is a human body within the preset range corresponding to the electronic device, the signal transceiver module 1 sends the second RF signal to the second RF module 4 with a relatively small third power, so that the second RF signal sent by the second RF module 4 meets the SAR limit requirements, that is, to prevent the electromagnetic radiation of the larger second RF signal from affecting human health. Correspondingly, when the trigger sensor detects that there is no human body approaching the electronic device or there is no human body within the preset range corresponding to the electronic device, the signal transceiver module 1 sends the second RF signal to the second RF module 4 with a relatively large fourth power, so that the second RF signal sent by the second RF module 4 is larger, thereby ensuring the communication quality of the electronic device.

[0070] Corresponding to the working state of the second RF module 4, when the second RF module 4 receives a second RF signal with a third power, it is in the first state; when the second RF module 4 receives a second RF signal with a fourth power, it is in the second state.

[0071] In another example, the working state of the second RF module 4 also includes a third state. Further, if the second RF module 4 is in the third state, the control transmits the first RF signal to the first RF module 3 through the second path to send it through the second power; wherein the third state represents that the second RF module 4 is in a working state where no signal is transmitted. For example, the electronic device to which the control circuit belongs does not need to communicate with the outside world through a WIFI 5G signal. At this time, the second RF module 4 is in a working state where no signal is transmitted, that is, the third state of the embodiment of the present application.

[0072] As an example, Figure 2The circuit diagram of the control module is shown. Figure 2 It can be seen that the control module 2 includes a converter 21 and a comparator 22. One end of the converter 21 is connected to the second RF module 4, and the other end of the converter 21 is connected to the comparator 22. Based on this, the converter 21 is used to detect the second RF power of the second RF module 4. Optionally, the converter 21 can be set as a detection diode to detect the second RF power of the second RF module 4 through the detection diode, that is, the converter 21, and determine the corresponding working voltage according to the detected second RF power, that is, the voltage when the second RF module 4 sends the second RF signal.

[0073] The converter 21 transmits the determined working voltage to the comparator 22, so that the comparator 22 compares the working voltage with the reference voltage. In a specific implementation, the electronic device may be provided with a trigger sensor or may not be provided with a trigger sensor. For the above two scenarios, the comparator 22 may be provided with different numbers and comparison mechanisms, as follows:

[0074] Scene 1

[0075] In the scenario where a trigger sensor is set in an electronic device and the trigger sensor operates normally, since the trigger sensor detects whether the electronic device is in a state of human proximity, the radio frequency signal emitted by the electronic device needs to meet the SAR limit requirements. For example, when the electronic device is a mobile phone, the corresponding SAR limit requirements include that the power should be less than 23dBm when the use distance from the human body is less than 20cm. Of course, different electronic devices have different corresponding SAR limit requirements.

[0076] Based on the above scenario, a comparator 22 can be set to compare the working voltage with the first reference voltage and the working voltage with the second reference voltage, wherein the second RF power corresponding to the first reference voltage represents the minimum power corresponding to the second RF module 4 when it is in the transmission signal, and the second RF power corresponding to the second reference voltage represents the maximum power corresponding to the second RF signal when it meets the SAR limit requirements.

[0077] Reference Figure 2 In the circuit diagram of the control module shown in FIG. 1 , the comparator 22 may include two voltage comparators, namely a first voltage comparator 221 and a second voltage comparator 222. The first voltage comparator 221 is used to compare the working voltage with the first reference voltage, and the second voltage comparator 222 is used to compare the working voltage with the second reference voltage. In other words, the converter 21 transmits the working voltage to the first voltage comparator 221 and the second voltage comparator 222, respectively.

[0078] Optionally, if the working voltage is greater than or equal to the first reference voltage, and the working voltage is less than the second reference voltage, it is determined that the second RF module 4 is in the first state, and the first state indicates that the electronic device is in a human body proximity state; if the working voltage is greater than the second reference voltage, it is determined that the second RF module 4 is in the second state, and the second state indicates that the electronic device is not in a human body proximity state; if the working voltage is less than the first reference voltage, it is determined that the second RF module 4 is in the third state. Among them, the size of the second RF signal sent by the signal transceiver module 1 is variable, and when the second RF module 4 is in the first state, the size of the second RF signal sent by the signal transceiver module 1 is the third size, and when the second RF module 4 is in the second state or the third state, the size of the second RF signal sent by the signal transceiver module 1 is the fourth size, and the third size is smaller than the fourth size.

[0079] In this scenario, when the second RF module 4 is in the first state, that is, the electronic device is in a human body proximity state, the control transmits the first RF signal to the first RF module 3 through the first path, so that the first RF module 3 receives a smaller first RF signal; when the second RF module 4 is in the second state, that is, the electronic device is in a human body proximity state, or the second RF module 4 is in the third state, that is, the electronic device is in a state of not transmitting the second RF signal, the control transmits the first RF signal to the first RF module 3 through the second path, so that the first RF module 3 receives a larger first RF signal. In this way, the SAR limit requirements can be met and the first RF signal can be ensured to be unaffected.

[0080] Scene 2

[0081] In the scenario where no trigger sensor is set in the electronic device, at this time, there is no need to limit the electronic device to meet the SAR limit. At this time, the comparator is used to compare the operating voltage and the first reference voltage, that is, the comparator can be set to include a voltage comparator. It should be noted that the circuit diagram of the control module in this scenario is not shown.

[0082] The comparator compares the operating voltage with the first reference voltage to determine whether the second RF module 4 is in a working state of transmitting signals. Optionally, if the operating voltage is greater than or equal to the first reference voltage, it is determined that the second RF module 4 is in a fourth state, and the fourth state indicates that the second RF module 4 is in a working state of transmitting signals; if the operating voltage is less than the first reference voltage, it is determined that the second RF module 4 is in a third state, that is, the second RF module 4 is in a working state of not transmitting signals.

[0083] In this scenario, when the second RF module 4 is in the fourth state, that is, the electronic device is in the state of transmitting the second RF signal, the control is to transmit the first RF signal to the first RF module 3 through the first path, so that the first RF module 3 receives a smaller first RF signal; when the second RF module 4 is in the third state, that is, the electronic device is in the state of not transmitting the second RF signal, the control is to transmit the first RF signal to the first RF module 3 through the second path, so that the first RF module 3 receives a larger first RF signal. Thus, the control module 2 is used to control the transmission of the first RF signal to the first RF module 3 through the first path or the second path based on the working state of the second RF module 4, that is, when the second RF module 4 transmits the second RF signal, the first RF signal is attenuated, and when the second RF module 4 does not transmit the second RF signal, the first RF signal is not attenuated. In this way, it can ensure that the first RF signal is small when the first RF module 3 and the second RF module 4 transmit RF signals at the same time, thereby avoiding the problem of the total RF signal of the electronic device being large and causing impact on human health; it can also ensure that the first RF signal is large when the second RF module 4 does not transmit the second RF signal, thereby ensuring the signal quality of the first RF signal, that is, ensuring the communication quality between the electronic device and the outside world.

[0084] In the embodiment of the present application, the first reference voltage is less than the second reference voltage.

[0085] Continue to refer to Figure 2 , the control module 2 also includes an XOR circuit, a first logic switch and a second logic switch. The output end of the comparator 22 is connected to the input end of the XOR circuit. After receiving the comparison result output by the comparator 22, the XOR circuit controls the first logic switch and the second logic switch to be closed or opened. Optionally, if the second RF module is in the first state, the first logic switch is controlled to be closed and the second logic switch is controlled to be opened; if the second RF module is in the second state, the first logic switch is controlled to be opened and the second logic switch is controlled to be closed.

[0086] It is worth noting that, referring to Figure 1It can be seen that the control circuit provided in the embodiment of the present application is also provided with a radio frequency switch SP2T, the first port L of the SP2T is connected to the first radio frequency module, the second port L1 of the SP2T is connected to the path corresponding to the RF1 port, the third port L2 of the SP2T is connected to the path corresponding to the RF2 port, and the SP2T is connected to the fourth port N of the control module 2. Correspondingly, if the second radio frequency module 4 is in the first state, the control module 2 controls the first port L of the SP2T to be turned on with the second port L1, so as to achieve the purpose of transmitting the first radio frequency signal to the first radio frequency module 3 through the first path; if the second radio frequency module 4 is in the second state, the control module 2 controls the first port L of the SP2T to be turned on with the third port L2, so as to achieve the purpose of transmitting the first radio frequency signal to the first radio frequency module 3 through the second path. The SP2T can avoid the short circuit of the control circuit, and ensure that the control circuit can work normally.

[0087] Optionally, the electronic device to which the control circuit belongs can send Bluetooth signals and WIFI 5G signals at the same time, that is, the signal transceiver module 1 can send the first radio frequency signal and the second radio frequency signal at the same time. Based on this, the control circuit also includes a combiner 5, referring to Figure 1 It can be seen that the combiner 5 is connected to the second RF module 4, the first RF module 3, and the antenna; the combiner 5 sends a RF signal to the antenna according to the power sum of the second RF module 4 and the first RF module 3. On this basis, the fourth power has a second difference with the third power, the first power has a first difference with the second power, and the first difference and the second difference are less than the preset threshold, thereby ensuring that the RF signal sent by the antenna can meet the SAR limit requirements.

[0088] The control circuit of the embodiment of the present application uses a control module to control the transmission of the first RF signal to the first RF module through the first path or the second path based on the working state of the second RF module, and the first size of the first RF signal received by the first RF module through the first path is different from the second size of the first RF signal received through the second path, that is, the first path and the second path can make the first RF module send the first RF signal with different powers, thereby changing the size of the first RF signal, avoiding the problem that the signal quality is affected due to the signal transceiver module being able to only send the first RF signal of a fixed size, that is, for different working states of the second RF module, it can ensure that the first RF signal is not affected while meeting the SAR limit requirements. That is to say, the control circuit of the embodiment of the present application can not only avoid the impact of electromagnetic radiation of larger RF signals on human health, but also ensure the communication quality between electronic equipment and the outside world.

[0089] The present application also provides a control method, using a control circuit, the control circuit includes a signal transceiver module, a control module, a first radio frequency module and a second radio frequency module; the control module is connected to the second radio frequency module; the control module is connected to the first radio frequency module and the signal transceiver module, and is used to transmit the first radio frequency signal sent by the signal transceiver module to the first radio frequency module. Since the principle of solving the problem of the first device in the present application is similar to the above-mentioned control method of the present application, the implementation of the control method can refer to the implementation of the control circuit, and the repeated parts will not be repeated.

[0090] Figure 3 A flow chart of a control method provided in an embodiment of the present application is shown, wherein specific steps of the control method include S301-S304.

[0091] S301, obtaining a second radio frequency power of a second radio frequency module;

[0092] S302: determining a working state of a second radio frequency module based on the second radio frequency power;

[0093] S303: If the second RF module is in the first state, control the first RF signal to be transmitted to the first RF module through a first path so as to be sent at a first power;

[0094] S304: If the second RF module is in the second state, control the first RF signal to be transmitted to the first RF module through a second path so as to be sent at a second power;

[0095] The signal transceiver module sends the first RF signal of the fixed size, and a first size of the first RF signal received by the first RF module through the first path is different from a second size of the first RF signal received through the second path.

[0096] In another example, if the second RF module is in a third state, control is performed to transmit the first RF signal to the first RF module through a second path so as to be sent at a second power; wherein the third state represents that the second RF module is in a working state where no signal is transmitted.

[0097] In another example, determining the working state of the second RF module based on the second RF power includes:

[0098] Based on the second radio frequency power, determining a corresponding operating voltage;

[0099] Compare the operating voltage with a first reference voltage and compare the operating voltage with a second reference voltage. If the operating voltage is greater than or equal to the first reference voltage and the operating voltage is less than the second reference voltage, determine that the second RF module is in the first state, and the first state indicates that the electronic device is in a state where a human body is approaching; if the operating voltage is greater than the second reference voltage, determine that the second RF module is in the second state, and the second state indicates that no human body is approaching the electronic device; if the operating voltage is less than the first reference voltage, determine that the second RF module is in the third state; or,

[0100] Comparing the operating voltage with the first reference voltage, if the operating voltage is greater than or equal to the first reference voltage, determining that the second RF module is in the fourth state, the fourth state indicating that the second RF module is in a working state of transmitting signals; if the operating voltage is less than the first reference voltage, determining that the second RF module is in the third state;

[0101] The first reference voltage is smaller than the second reference voltage.

[0102] The control method of the embodiment of the present application effectively avoids the problem that the signal quality is affected by the fact that the signal transceiver module can only send a first radio frequency signal of a fixed size. It can meet the SAR limit requirements for different working states of the second radio frequency module while ensuring that the first radio frequency signal is not affected. That is, it can not only avoid the impact of electromagnetic radiation of larger radio frequency signals on human health, but also ensure the communication quality between the electronic device and the outside world.

[0103] In addition, although exemplary embodiments have been described herein, the scope includes any and all embodiments based on the present application with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of the application, and the examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0104] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, those of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the application. This should not be interpreted as an intention that a disclosed feature that does not require protection is necessary for any claim. On the contrary, the subject matter of the present application may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present application should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

[0105] Multiple embodiments of the present application are described in detail above, but the present application is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications to the embodiments based on the concept of the present application, and these variations and modifications should all fall within the scope of protection required by the present application.

Claims

1. A control circuit, comprising a signal transceiver module, a control module, a first radio frequency module and a second radio frequency module; The control module is connected to the second radio frequency module; The control module is connected to the first RF module and the signal transceiver module, and is used to transmit the first RF signal sent by the signal transceiver module to the first RF module; The control module is also used for: detecting a second radio frequency power of the second radio frequency module, and determining a working state of the second radio frequency module based on the second radio frequency power; If the second RF module is in a first state, controlling the first RF signal to be transmitted to the first RF module through a first path so as to be sent at a first power; If the second RF module is in a second state, controlling the first RF signal to be transmitted to the first RF module through a second path so as to be sent at a second power; The signal transceiver module sends the first RF signal of the fixed size, and a first size of the first RF signal received by the first RF module through the first path is different from a second size of the first RF signal received through the second path.

2. According to the control circuit of claim 1, a T-type attenuation network or a π-type attenuation network is arranged in the first path, the first RF module maintains a fixed power amplification gain in the first state and the second state, the first size of the first RF signal is smaller than the second size of the first RF signal, and the first power is smaller than the second power.

3. The control circuit according to claim 1, The signal transceiver module is also used to transmit a second RF signal to the second RF module, wherein when the second RF module is in the first state, the second RF signal sent by the second RF module has a third power, and when the second RF module is in the second state, the second RF signal sent by the second RF module has a fourth power, the third power is less than the fourth power, the fourth power and the third power have a second difference, the first power and the second power have a first difference, and the first difference and the second difference are less than a preset threshold.

4. The control circuit according to claim 1, wherein the control module is further used for: If the second RF module is in the third state, controlling the first RF signal to be transmitted to the first RF module through the second path so as to be sent at the second power; wherein, The third state indicates that the second RF module is in a working state of not transmitting signals.

5. The control circuit according to claim 4, wherein the control module comprises a converter and a comparator; The converter is used to detect the second RF power of the second RF module to determine the corresponding working voltage, and the comparator is used to compare the working voltage with the first reference voltage and the working voltage with the second reference voltage. If the working voltage is greater than or equal to the first reference voltage, and the working voltage is less than the second reference voltage, it is determined that the second RF module is in the first state, and the first state indicates that the electronic device is in a human body proximity state; If the operating voltage is greater than the second reference voltage, it is determined that the second RF module is in the second state, and the second state indicates that no human body is close to the electronic device; if the operating voltage is less than the first reference voltage, it is determined that the second RF module is in the third state; or, The comparator is used to compare the working voltage with the first reference voltage, and if the working voltage is greater than or equal to the first reference voltage, it is determined that the second RF module is in the fourth state, and the fourth state indicates that the second RF module is in a working state of transmitting signals; If the operating voltage is less than the first reference voltage, determining that the second RF module is in the third state; The first reference voltage is smaller than the second reference voltage.

6. The control circuit according to claim 3, wherein the signal transceiver module is further used to obtain the state of a trigger sensor, and the trigger sensor is used to detect whether the electronic device is in a state where a human body is approaching; When the trigger sensor detects that the electronic device is in a human body proximity state, the second radio frequency signal sent by the signal transceiver module has the third power; When the trigger sensor detects that the electronic device is in a state where no human body is approaching, the signal transceiver module sends the second radio frequency signal with the fourth power.

7. According to the control circuit of claim 1, the control circuit also includes a combiner, which is connected to the second RF module, the first RF module, and the antenna; the first RF signal is a Bluetooth signal, and the second RF signal is a Wi-Fi 5G signal; the combiner sends an RF signal to the antenna according to the power sum of the second RF module and the first RF module.

8. A control method, using a control circuit, the control circuit comprising a signal transceiver module, a control module, a first radio frequency module and a second radio frequency module; The control module is connected to the second radio frequency module; The control module is connected to the first RF module and the signal transceiver module, and is used to transmit the first RF signal sent by the signal transceiver module to the first RF module; The control method comprises: Obtaining a second radio frequency power of a second radio frequency module; Based on the second radio frequency power, determining a working state of the second radio frequency module; If the second RF module is in a first state, controlling the first RF signal to be transmitted to the first RF module through a first path so as to be sent at a first power; If the second RF module is in a second state, controlling the first RF signal to be transmitted to the first RF module through a second path so as to be sent at a second power; The signal transceiver module sends the first RF signal of the fixed size, and a first size of the first RF signal received by the first RF module through the first path is different from a second size of the first RF signal received through the second path.

9. The control method according to claim 8, If the second RF module is in the third state, controlling the first RF signal to be transmitted to the first RF module through the second path so as to be sent at the second power; wherein, The third state indicates that the second RF module is in a working state of not transmitting signals.

10. The control method according to claim 8, wherein determining the working state of the second RF module based on the second RF power comprises: Based on the second radio frequency power, determining a corresponding operating voltage; Comparing the operating voltage with a first reference voltage and comparing the operating voltage with a second reference voltage, if the operating voltage is greater than or equal to the first reference voltage and the operating voltage is less than the second reference voltage, determining that the second RF module is in the first state, the first state indicating that the electronic device is in a human body proximity state; If the operating voltage is greater than the second reference voltage, it is determined that the second RF module is in the second state, and the second state indicates that no human body is close to the electronic device; if the operating voltage is less than the first reference voltage, it is determined that the second RF module is in the third state; or, Comparing the operating voltage with the first reference voltage, if the operating voltage is greater than or equal to the first reference voltage, determining that the second RF module is in the fourth state, wherein the fourth state indicates that the second RF module is in a working state of transmitting a signal; If the operating voltage is less than the first reference voltage, determining that the second RF module is in the third state; The first reference voltage is smaller than the second reference voltage.

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