Capacitive shock cancellation circuit, power device module, electronic device, and method
By designing control and switching modules and switching the power supply to capacitor power, the noise interference caused by capacitor vibration is solved, and the stability and cost-effectiveness of capacitor voltage are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI WINGTECH ELECTRONICS TECH
- Filing Date
- 2022-03-18
- Publication Date
- 2026-07-14
AI Technical Summary
The vibrations caused by capacitors during charging and discharging generate noise interference. Existing technologies using noise-reducing capacitors can only alleviate the problem but cannot solve it at its root, and they also increase circuit costs.
By coordinating the control module and the switching module, and switching between the first power module and the second power module, the capacitor is powered by the second power module when the first power module is not powered, thus maintaining a stable voltage across the capacitor and preventing vibration.
Noise interference caused by capacitor vibration can be eliminated at its source without the need for noise-reducing capacitors. This method is low-cost, does not cause repeated noise, and achieves stability of capacitor voltage.
Smart Images
Figure CN114696752B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of circuit technology, specifically to capacitor vibration cancellation circuits, power device modules, electronic devices, and methods. Background Technology
[0002] Mobile communication circuits often employ high-power circuits, which utilize numerous energy storage and filtering capacitors to mitigate the impact of capacitance fluctuations on components. However, once a capacitor enters a charging or discharging state, it is susceptible to vibration due to the force of the electric field, generating noise within the audio range and interfering with the phone's audio. On the phone's motherboard, the RF power amplifier, due to its high current consumption, requires large capacitors and is a primary area of capacitor vibration on the motherboard.
[0003] In existing technologies, the interference of capacitor-induced vibration on audio can be mitigated using noise-canceling capacitors. When the voltage of a noise-canceling capacitor changes, the capacitor is less prone to vibration, thus reducing its impact on audio. However, this does not solve the problem of capacitor vibration at its root. In some sensitive circuits, capacitors can still generate noise due to voltage fluctuations, and using noise-canceling capacitors increases the cost of the circuit.
[0004] Public content
[0005] Therefore, it is necessary to provide a capacitor vibration elimination circuit, a power device module, an electronic device, and a method to address the aforementioned technical problems and solve the noise interference caused by capacitor vibration in the circuit.
[0006] In a first aspect, embodiments of this disclosure provide a capacitor vibration cancellation circuit, comprising:
[0007] Control module, switch module, first power supply module, second power supply module, and capacitor;
[0008] The control module is electrically connected to the switch module; the first power module and the second power module are grounded through the capacitor; the switch module and the first power module are both electrically connected to the capacitor; the second power module is electrically connected to the capacitor through the switch module; the control module is used to control the switch module to electrically connect the second power module to the capacitor when the first power module is not powered.
[0009] In some embodiments, the switch module includes a first switch;
[0010] The control terminal of the first switch is electrically connected to the control module; the common terminal of the first switch is electrically connected to the first power module; the first connection terminal of the first switch is electrically connected to the second power module; and the second connection terminal of the first switch is electrically connected to the power device.
[0011] In some embodiments, the system further includes at least one second switch, wherein a first connection terminal of the second switch is electrically connected to the first power module; a second connection terminal of the second switch is electrically connected to a power device; and a control terminal of the second switch is electrically connected to the control module.
[0012] In a second aspect, the present disclosure also provides a power device module, including a power device and the capacitor vibration elimination circuit described in any embodiment of the first aspect;
[0013] The power device is electrically connected to the first power module through the switching module of the capacitor vibration elimination circuit.
[0014] In some embodiments, the power device includes a radio frequency amplifier.
[0015] In some embodiments, the switch module includes a first switch;
[0016] The control terminal of the first switch is electrically connected to the control module; the common terminal of the first switch is electrically connected to the first power module; the first connection terminal of the first switch is electrically connected to the second power module; and the second connection terminal of the first switch is electrically connected to each stage of the RF amplifier circuit.
[0017] In some embodiments, the switch module includes a first switch and at least one second switch;
[0018] The control terminal of the first switch is electrically connected to the control module; the common terminal of the first switch is electrically connected to the first power module; the first connection terminal of the first switch is electrically connected to the second power module; and the second connection terminal of the first switch is electrically connected to the first stage amplifier circuit of the radio frequency amplifier.
[0019] The first connection terminal of the second switch is electrically connected to the first power module; the second connection terminal of each second switch is electrically connected to the other stages of the RF amplifier circuit; and the control terminal of the second switch is electrically connected to the control module.
[0020] In some embodiments, the system further includes a radio frequency transceiver control unit, wherein the radio frequency transceiver control module is electrically connected to the control module and the first power module respectively;
[0021] The radio frequency transceiver control module is used to control the state of the first power module according to the operating mode of the radio frequency amplifier, and instruct the control module to control the switching module to electrically connect the first power module to the radio frequency amplifier when the first power module is in a powered state; and instruct the control module to control the switching module to electrically connect the second power module to the capacitor when the first power module is in a powered-off state.
[0022] Thirdly, embodiments of this disclosure also provide an electronic device including the power device module described in any embodiment of the second aspect.
[0023] Fourthly, embodiments of this disclosure also provide a method for eliminating capacitor vibration, applicable to the power device module described in any embodiment of the second aspect, the method comprising:
[0024] Determine the status of the first power module;
[0025] When the first power module is in the power supply state, the switch module is controlled to electrically connect the first power module to the radio frequency amplifier;
[0026] When the first power module is in a non-powered state, the switch module is controlled to electrically connect the second power module to the capacitor.
[0027] The capacitor vibration cancellation circuit provided in this embodiment includes a control module, a switch module, a first power supply module, a second power supply module, and a capacitor. The control module is electrically connected to the switch module; the first power supply module and the second power supply module are grounded through the capacitor; both the switch module and the first power supply module are electrically connected to the capacitor; the second power supply module is electrically connected to the capacitor through the switch module; the control module is used to control the switch module to electrically connect the second power supply module to the capacitor when the first power supply module is not supplying power. By controlling the switch to turn off, the control module supplies power to the capacitor through the second power supply when the first power supply module is not supplying power, ensuring the stability of the capacitor voltage. This embodiment eliminates the need for noise reduction capacitors, thus fundamentally solving the noise interference caused by capacitor vibration to the circuit, and requires lower costs in solving the capacitor vibration problem, without the occurrence of recurring noise. Attached Figure Description
[0028] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings.
[0029] Figure 1This is a schematic diagram of the structure of a capacitor vibration cancellation circuit provided in an embodiment of the present disclosure;
[0030] Figure 2 A schematic diagram of another capacitor vibration cancellation circuit provided in this embodiment of the present disclosure;
[0031] Figure 3 A circuit diagram of a power device module provided in an embodiment of this disclosure;
[0032] Figure 4 This is a schematic flowchart of a capacitive vibration elimination method provided in an embodiment of the present disclosure. Detailed Implementation
[0033] To better understand the above-described objectives, features, and advantages of this disclosure, the present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the described embodiments are only some, not all, of the embodiments of this disclosure. The specific embodiments described herein are merely for explaining this disclosure and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure are within the scope of protection of this disclosure.
[0034] This disclosure provides a capacitor vibration cancellation circuit. Figure 1 This is a schematic diagram of a capacitor vibration cancellation circuit provided in an embodiment of the present disclosure, as shown below. Figure 1 As shown, it includes: a control module 11, a switch module 12, a first power supply module 13, a second power supply module 14, and a capacitor 15.
[0035] The control module 11 is electrically connected to the switch module 12. The first power module 13 and the second power module 14 are grounded through the capacitor 15. The switch module 12 and the first power module 13 are both electrically connected to the capacitor 15, and the second power module 14 is electrically connected to the capacitor 15 through the switch module 12. The control module 11 is used to control the switch module 12 to electrically connect the second power module 14 to the capacitor 15 when the first power module 13 is not powered.
[0036] Specifically, the control module 11 can obtain the power supply status of the first power module 13 and the second power module 14, and send a control signal to the switch module 12 electrically connected to it to control the switching module 12 to turn on and off. The switch module 12 is electrically connected to both the first power module 13 and the second power module 14. The first power module 13 is directly electrically connected to the capacitor 15 to supply power to the capacitor 15, and the second power module 14 is electrically connected to the capacitor 15 through the switch module 12. When the control module 11 detects that the first power module 13 is in a non-powered state, it controls the switch module 12 to turn on. At this time, the second power module 14 and the capacitor 15 are connected to form a circuit, and the second power module 14 supplies power to the capacitor 15.
[0037] If the first power module 13 resumes power supply to the capacitor 15, the control module 11 sends a control signal to the switch module 12 again, causing the switch module 12 to disconnect. This disconnects the second power module 14 from the capacitor 15, and the second power module 14 no longer supplies power to the capacitor 15. The first power module 13 then continues to supply power to the capacitor 15. This ensures that the voltage across the capacitor 15 remains stable and prevents voltage drop.
[0038] In this embodiment, the control module sends a control signal, which is then selected by the switching module to provide continuous power to the capacitor. This ensures that the voltage across the capacitor remains stable, preventing voltage fluctuations that could cause capacitor vibration. This embodiment eliminates the need for noise-reducing capacitors, thus addressing the noise interference caused by capacitor vibration at its source. Furthermore, it reduces costs and avoids recurring noise issues.
[0039] In some embodiments, Figure 2 This is a schematic diagram of another capacitive vibration cancellation circuit provided in an embodiment of the present disclosure, as shown below. Figure 2 As shown, the switch module 12 includes a first switch 121. The control terminal of the first switch 121 is electrically connected to the control module, the common terminal of the first switch 121 is electrically connected to the first power module 13, the first connection terminal of the first switch 121 is electrically connected to the second power module 14, and the second connection terminal of the first switch 121 is electrically connected to the power device 161.
[0040] Specifically, the control terminal of the first switch 121 receives a control signal from the control module 11 and selects the power module to supply power to the capacitor 15. The common terminal of the first switch 121 is electrically connected to the first power module and also electrically connected to the capacitor 15 on the first power module side. The first connection terminal of the first switch 121 is electrically connected to the second power module 14. When the first power module 13 is in the non-powered mode, the control module 11 sends a control signal to the first switch 121, controlling the first terminal of the first switch 121 to be in a conducting state with the second power module 14. The second power module 14 is connected to the capacitor 15 on the first power module side, supplying power to the capacitor 15. When the first power module 13 is in the powered mode, the control module 11 sends a control signal to the first switch 121, controlling the first terminal of the first switch 121 to be in a disconnected state with the second power module 14. The second power module 14 no longer supplies power to the capacitor 15, and the first power module 13 supplies power to the capacitor 15. When the first power module 13 is in power supply mode, the second connection terminal of the first switch 121 is in a conducting state with the power device 161; when the first power module 13 is in a non-power supply mode, that is, the power device 161 is not working and does not require power supply, the second connection terminal of the first switch 121 is in a disconnected state with the power device 161.
[0041] In some embodiments, such as Figure 2 As shown, it also includes at least one second switch 122. The first connection terminal of the second switch 122 is electrically connected to the first power module 13, the second connection terminal of the second switch 122 is electrically connected to the power device 162, and the control terminal of the second switch 122 is electrically connected to the control module 11.
[0042] Specifically, the second switch 122 receives a control signal from the control module 11. When the first power module 13 is in power supply mode, it needs to supply power to the power device 162, and the second switch 122 is in the on state, allowing the first power module 13 to supply power to the power device 162 via the second switch 122. When the first power module 13 is in the off state, it does not need to supply power to the power device 162, and the control module 11 is electrically connected to the second switch 122, controlling the second switch 122 to open. When the power device 162 is working, the first power module 13 re-supplyes the power device 162, and the control module 11 controls the second switch 122 to open. The first power module 13 only supplies power to the power device 162 when it is working, achieving intelligent power saving and avoiding waste caused by leakage current.
[0043] This disclosure also provides a power device module. Figure 3 A circuit diagram of a power device module provided in an embodiment of this disclosure, such as... Figure 3 As shown, it includes a power device 16 and a capacitor vibration cancellation circuit as described in any of the above embodiments. The power device 16 is electrically connected to the first power supply module 13 through the switching module 12 of the capacitor vibration cancellation circuit.
[0044] Specifically, higher-power circuits typically include multiple power devices 16. These power devices 16 are primarily high-power electronic components used in the power conversion and control circuits of electrical equipment, usually handling high current and voltage, and performing circuit processing operations such as frequency conversion, voltage transformation, current conversion, and power management. These circuits utilize a large number of capacitors to ensure voltage stability, but they are also prone to capacitor vibration, thus requiring capacitor vibration suppression circuits. The power devices 16 can be powered by the first power module 13, which is electrically connected to the first power module 13 via a switch module 12. When the first power module 13 is in a non-powered mode and cannot supply power to the capacitor, the switch module 12 controls the second power module 14 to conduct, supplying power to the capacitor, and maintaining a stable voltage across the capacitor 15.
[0045] In some embodiments, the power device includes a radio frequency amplifier.
[0046] Specifically, an RF amplifier converts low-power RF signals into higher-power signals. The crucial function of an RF amplifier is to amplify power, achieving sufficient signal strength for radiated signal without distortion. An RF amplifier can include a series of amplification driver stages, intermediate power amplification stages, and a final power amplification stage to achieve the required amplification power. For example... Figure 3 In the figure, the power device 16 is an RF amplifier, which includes a driver stage 162 and an amplification stage 161. It amplifies the power of the input RF signal and outputs an RF signal with the required power.
[0047] When the RF amplifier operates in time-division duplex mode, in order to save power, the time-division duplex mode frequency band will be turned on during the transmit time slot and turned off during the receive time slot. The frequency of this on and off falls within the audio range, which will cause capacitor vibration.
[0048] Therefore, in time-division duplex mode, where the output voltage of the first power module 13 is not always present, the voltage of the first power module 13 may drop from approximately 3.4V to 0V within one cycle. It is necessary to keep the voltage across the capacitor stable and prevent it from dropping to 0V. The RF amplifier can supply power to the capacitor via the second power module 14 when the first power module 13 is in an unpowered mode, thus avoiding the unstable voltage across the capacitor and resolving the capacitor vibration problem.
[0049] In some embodiments, such as Figure 3 As shown, the switch module 12 includes a first switch 121. The control terminal of the first switch 121 is electrically connected to the control module 11, and the common terminal of the first switch 121 is electrically connected to the first power module 13; the first connection terminal of the first switch 121 is electrically connected to the second power module 14, and the second connection terminal of the first switch 121 is electrically connected to the various stages of the amplification circuit of the RF amplifier 16.
[0050] The first switch 121 is controlled by the control module 11. When the first power module is in power supply mode, the second connection terminal of the first switch is connected to the driver stage 162 and the amplification stage 161 of the RF amplifier 16. The first power module 13 supplies power to each stage of the RF amplifier 16 and supplies power to the capacitor 15. The first connection terminal of the first switch 121 is disconnected from the second power module 14. If the first power module is in non-power supply mode, the second connection terminal of the first switch is disconnected from the driver stage 162 and the amplification stage 161 of the RF amplifier 16, and the first connection terminal of the first switch 121 is connected to the second power module 14. The circuit between the first power module 13 and the capacitor 15 is connected, and the second power module 14 supplies power to the capacitor 15 to prevent the voltage of the capacitor 15 from dropping and causing vibration.
[0051] In some embodiments, such as Figure 3 As shown, the switch module 12 includes a first switch 121 and at least one second switch 122. The control terminal of the first switch 121 is electrically connected to the control module 11, the common terminal of the first switch 121 is electrically connected to the first power module 13, the first connection terminal of the first switch 121 is electrically connected to the second power module 14, and the second connection terminal of the first switch 121 is electrically connected to the first stage amplifier circuit 161 of the RF amplifier 16. The first connection terminal of the second switch 122 is electrically connected to the first power module 13, and the second connection terminals of each second switch 122 are electrically connected to the other stages of the RF amplifier 16. The control terminal of the second switch 122 is electrically connected to the control module 11.
[0052] For example, Figure 3 The first-stage amplifier circuit 161 is the amplification stage of the RF amplifier, and a driver stage 162 of the RF amplifier is also provided in front of it. A first switch is connected to the first-stage amplifier circuit 161, and a second switch is connected to the driver stage 162 of the RF amplifier. When the RF amplifier 16 operates in time-division duplex mode, to save power, the first power module 13 only supplies power when the RF amplifier 16 transmits signals, and stops supplying power when the RF amplifier 16 receives signals, thus achieving a power-saving effect.
[0053] Therefore, when the RF amplifier 16 is transmitting a signal, the first power module 13 is in power supply mode and needs to supply power to each stage of the RF amplifier 16. In this case, the first power module 13 supplies power to the amplification stage 161 of the RF amplifier 16 via the first switch 121, and to the drive stage 162 of the RF amplifier 16 via the second switch 122, and also supplies power to the capacitor 15. The capacitor 15 is used for energy storage and filtering to prevent unstable output signals. When the RF amplifier 16 is receiving a signal, the first power module 13 is in unpowered mode and does not need to supply power to each stage of the RF amplifier 16. However, since the first power module 13 cannot supply power to the capacitor 15, the first connection terminal of the first switch 11 needs to be connected to the second power module 14, and the second power module 14 supplies power to the capacitor 15. The voltage across the capacitor 15 will not fluctuate, and the capacitor will not generate noise. Alternatively, according to actual needs, when the first power module 13 is not powered, the second switch can be disconnected to prevent leakage current and save energy.
[0054] In some embodiments, such as Figure 3 As shown, it also includes a radio frequency transceiver control unit, and the radio frequency transceiver control module 17 is electrically connected to the control module 11 and the first power supply module 13 respectively.
[0055] The RF transceiver control module 17 controls the state of the first power module 13 according to the operating mode of the RF amplifier 16, and instructs the control module 11 to control the switch module 12 to electrically connect the first power module 13 to the RF amplifier 16 when the first power module 13 is in a powered-on state. Instructing the control module 11 to control the switch module 11 to electrically connect the second power module 14 to the capacitor 15 when the first power module 13 is in a powered-off state.
[0056] The RF transceiver control module 17 can control the operating mode of the RF amplifier 16 and the on / off state of the switch module 12, and control the power supply state of the first power module 13 according to the operating state of the RF amplifier 16. Since the RF amplifier can have multiple operating modes, including time-division duplex and frequency-division duplex modes, but in time-division duplex mode, the RF amplifier does not need power when receiving signals. To save power, the RF transceiver control module 17 will issue the current signal transmission mode and control the switch module 12 to disconnect the first power module 13 from the RF amplifier 16, putting the first power module 13 in an unpowered mode. It will also control the switch module 12 to connect the second power module 14 and capacitor 15, supplying power from the second power module 14. When receiving signals outside of time-division duplex mode, the RF transceiver control module 17 controls the switch module 12 to connect the first power module 13 to the RF amplifier 16 and disconnect the second power module 14 from capacitor 15. The entire power module can operate normally without causing voltage fluctuations across the capacitor, thus preventing vibration and achieving power saving.
[0057] In some embodiments, the first power module 13 is connected to two capacitors, each grounded, and the second power module 14 is connected to two capacitors, each grounded. The capacitors in the power bypass circuit generally filter out fluctuations in the power supply voltage. Small capacitors filter high frequencies, large capacitors filter low frequencies, and also provide a certain voltage reserve for subsequent circuit needs. Multiple capacitors can be selected with different sizes to filter different waveforms. It should be noted that this disclosure does not limit the number or size of the capacitors; they can be selected according to circuit requirements.
[0058] In some embodiments, a third power module 18 is also connected to the control module 11 for supplying power to the control module 11. This can be selected according to actual needs, for example, as shown in the example below. Figure 3 The third power supply module 18 can be a 1.8V DC power supply to power the control module 11.
[0059] This disclosure also provides an electronic device including the power device module described in any of the above embodiments. Since this disclosure includes the power device module in any of the above embodiments, it has the same or corresponding beneficial effects as the power device modules described in the above embodiments, and will not be repeated here. The electronic device can be various electronic devices such as mobile phones and computers, and this disclosure does not limit it.
[0060] This disclosure also provides a method for eliminating capacitive vibrations. Figure 4 This is a flowchart illustrating a capacitive vibration elimination method provided in an embodiment of this disclosure, as shown below. Figure 4 As shown, the capacitor vibration elimination method, applicable to the power device module described in any of the above embodiments, includes:
[0061] S110. Determine the status of the first power module.
[0062] The first power module has multiple operating states, including a powered state and a powered-off state. In the powered-off state, it can supply power to the power devices and their connected capacitors; in the powered-off state, it does not need to supply power to the power devices, and it also cannot supply power to the capacitors connected to them. Therefore, it is necessary to determine the state of the first power module.
[0063] S120. When the first power module is in the power supply state, the control switch module electrically connects the first power module to the RF amplifier.
[0064] If it is determined that the first power module is in a powered state, the control switch module will connect the first power module and the RF amplifier. The first power module can provide the required power to the RF amplifier and can also supply power to the capacitor connected to the first power module.
[0065] S130. When the first power module is in a non-powered state, the control switch module connects the second power module to the capacitor.
[0066] If it is determined that the first power module is not powered, the control switch module will connect the second power module and the RF amplifier. The first power module cannot be powered by the capacitor connected to the first power module. At this time, the second power module is powered by the capacitor to prevent voltage changes across the capacitor.
[0067] First, the system determines whether the first power module is in power-on or power-off mode, and then determines the on / off state of the control switch module based on the different states of the first power module. If the first power module is in power-on mode, the control switch module connects the first power module to the RF amplifier, allowing the first power module to supply power to the RF amplifier and the capacitor connected to it. The second power module is disconnected from the capacitor on the first power module side. If the first power module is in power-off mode, the control switch module disconnects the first power module from the RF amplifier and connects the second power module to the capacitor on the first power module side. The second power module then supplies power to the capacitor, ensuring that the voltage across the capacitor remains stable regardless of the state of the first power module, preventing voltage fluctuations and frequency changes that could cause vibrations.
[0068] In this embodiment, the control module sends a control signal, which is then selected by the switching module to provide continuous power to the capacitor. This ensures that the voltage across the capacitor remains stable, preventing voltage fluctuations that could cause capacitor vibration. This embodiment eliminates the need for noise-reducing capacitors, thus addressing the noise interference caused by capacitor vibration at its source. Furthermore, it reduces costs and avoids recurring noise issues.
[0069] In some embodiments, the capacitor vibration cancellation method further includes: controlling the electrical connection between the first power module and the radio frequency amplifier, and the electrical connection between the second power module and the capacitor by controlling the first switching module.
[0070] Specifically, the on / off state of the first power module is controlled based on its determined state. If the first power module is in power-on mode, the first switch connects the first power module to the RF amplifier, supplying power to the RF amplifier and its connected capacitor. The second power module is disconnected from the capacitor connected to the first power module. If the first power module is in a non-power-on state, the first switch disconnects the first power module from the RF amplifier, connecting the second power module to the RF amplifier. The second power module supplies power to the RF amplifier and its connected capacitor. Regardless of the state of the first power module, the voltage across the capacitor remains constant to prevent voltage fluctuations from causing vibrations in the capacitor.
[0071] In some embodiments, the capacitive vibration cancellation method further includes controlling the electrical connection between the first power module and the radio frequency amplifier by controlling a second switch.
[0072] Specifically, when the first power module is in power-on mode, the second switch is controlled to connect the first power module and the RF amplifier, allowing the first power module to directly power the RF amplifier. When the first power module is in power-off mode, the second switch is controlled to disconnect the connection between the first power module and the RF amplifier. In this case, the first power module does not power the RF amplifier, and the RF amplifier does not require power. Turning off the second switch prevents current leakage into the RF amplifier, thus avoiding current waste. It should be noted that this application does not limit the number of second switches; they can be selected according to the power devices.
[0073] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.
[0074] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of this disclosure and form different embodiments.
[0075] Although embodiments of the present disclosure have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present disclosure, and all such modifications and variations fall within the scope defined by the appended claims.
Claims
1. A capacitor vibration cancellation circuit, characterized in that, include: Control module, switch module, first power supply module, second power supply module, and capacitor; The control module is electrically connected to the switch module; The first power module and the second power module are grounded through the capacitor; Both the switch module and the first power module are electrically connected to the capacitor. The switch module includes: a first switch and at least one second switch; The control terminal of the first switch is electrically connected to the control module; the common terminal of the first switch is electrically connected to the first power module; the first connection terminal of the first switch is electrically connected to the second power module; and the second connection terminal of the first switch is electrically connected to the power device. The first connection terminal of the second switch is electrically connected to the first power module; the second connection terminal of the second switch is electrically connected to the power device; the control terminal of the second switch is electrically connected to the control module. The second power module is electrically connected to the capacitor through the switch module; the control module is used to obtain the power supply status of the first power module, and when the first power module is not powered, control the switch module to electrically connect the second power module to the capacitor. The second power module supplies power to the capacitor, maintains a stable voltage across the capacitor, and eliminates capacitor vibration.
2. A power device module, characterized in that, Includes power devices and the capacitor vibration cancellation circuit as described in claim 1; The power device is electrically connected to the first power module through the switching module of the capacitor vibration elimination circuit.
3. The power device module according to claim 2, characterized in that, The power device includes a radio frequency amplifier.
4. The power device module according to claim 3, characterized in that, The switch module includes a first switch; The control terminal of the first switch is electrically connected to the control module; the common terminal of the first switch is electrically connected to the first power module; the first connection terminal of the first switch is electrically connected to the second power module; and the second connection terminal of the first switch is electrically connected to each stage of the RF amplifier circuit.
5. The power device module according to claim 3, characterized in that, The switch module includes a first switch and at least one second switch; The control terminal of the first switch is electrically connected to the control module; the common terminal of the first switch is electrically connected to the first power module; the first connection terminal of the first switch is electrically connected to the second power module; and the second connection terminal of the first switch is electrically connected to the first stage amplifier circuit of the radio frequency amplifier. The first connection terminal of the second switch is electrically connected to the first power module; the second connection terminal of each second switch is electrically connected to the other stages of the RF amplifier circuit; and the control terminal of the second switch is electrically connected to the control module.
6. The power device module according to claim 3, characterized in that, It also includes a radio frequency transceiver control unit, wherein the radio frequency transceiver control module is electrically connected to the control module and the first power module respectively; The radio frequency transceiver control module is used to control the state of the first power module according to the operating mode of the radio frequency amplifier, and instruct the control module to control the switching module to electrically connect the first power module to the radio frequency amplifier when the first power module is in a powered state; and instruct the control module to control the switching module to electrically connect the second power module to the capacitor when the first power module is in a powered-off state.
7. An electronic device, characterized in that, The power device module includes any one of claims 2-6.
8. A method for eliminating capacitive vibration, characterized in that, The method, applicable to any one of claims 2-6, comprises: Determine the status of the first power module; When the first power module is in the power supply state, the switch module is controlled to electrically connect the first power module to the radio frequency amplifier; When the first power module is in a non-powered state, the switch module is controlled to electrically connect the second power module to the capacitor.