CN114696752A - Capacitance vibration elimination circuit, power device module, electronic equipment and method - Google Patents

Abstract

The present disclosure relates to a capacitance vibration elimination circuit, a power device module, an electronic apparatus and a method, wherein the capacitance vibration elimination circuit includes: the circuit comprises 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 with the switch module; the first power supply module and the second power supply module are grounded through the capacitor; the switch module and the first power supply module are electrically connected with the capacitor; the second power supply module is electrically connected with the capacitor through the switch module; the control module is used for controlling the switch module to electrically connect the second power supply module with the capacitor when the first power supply module is not powered. The embodiment of the disclosure can fundamentally solve the noise interference caused by the capacitance vibration to the circuit without using a noise reduction capacitor, and the cost required in the process of solving the capacitance vibration problem is lower, and the repeated noise condition can not occur.

Description

Capacitance vibration elimination circuit, power device module, electronic equipment and method

Technical Field

The disclosure relates to the technical field of circuits, and in particular relates to a capacitance vibration elimination circuit, a power device module, electronic equipment and a method.

Background

In mobile communication, circuits with higher power are used, and in the circuits, a large amount of energy storage capacitors and filter capacitors are used to relieve the influence of capacitance fluctuation on components. However, once the capacitor is charged or discharged, the capacitor will easily vibrate due to the force of the electric field, so as to generate noise falling in the audio frequency range, and interfere with the audio frequency of the mobile phone. On the mainboard of the mobile phone, the radio frequency power amplifier needs to increase a large capacitance due to large current consumption, and is a main capacitance vibration area on the mainboard of the mobile phone.

In prior art, the interference of the vibration caused by the capacitor to the audio frequency can be alleviated by the noise reduction capacitor, and when the voltage of the noise reduction capacitor changes, the capacitor is not easy to vibrate, so that the influence of the capacitor on the audio frequency can be alleviated. But does not fundamentally solve the problem of capacitive vibration. In some sensitive circuits, the capacitor generates noise due to voltage fluctuation, and the use of the noise reduction capacitor increases the cost of the circuit.

BRIEF SUMMARY OF THE PRESENT DISCLOSURE

Accordingly, it is desirable to provide a circuit for eliminating capacitive vibration, a power device module, an electronic apparatus and a method thereof, so as to solve the problem of noise interference caused by capacitive vibration in the circuit.

In a first aspect, an embodiment of the present disclosure provides a capacitive shock cancellation circuit, including:

the power supply comprises 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 with the switch module; the first power supply module and the second power supply module are grounded through the capacitor; the switch module and the first power supply module are electrically connected with the capacitor; the second power supply module is electrically connected with the capacitor through the switch module; the control module is used for controlling the switch module to electrically connect the second power supply module with the capacitor when the first power supply module is not powered.

In some embodiments, the switch module comprises a first switch;

the control end of the first switch is electrically connected with the control module; the public end of the first switch is electrically connected with the first power supply module; the first connecting end of the first switch is electrically connected with the second power supply module; the second connection end of the first switch is electrically connected with the power device.

In some embodiments, the power supply further comprises at least one second switch, wherein a first connection end of the second switch is electrically connected with the first power supply module; the second connecting end of the second switch is electrically connected with the power device; and the control end of the second switch is electrically connected with the control module.

In a second aspect, an embodiment of the present disclosure further provides a power device module, including a power device and the capacitive vibration canceling circuit according to any embodiment of the first aspect;

the power device is electrically connected with the first power supply module through a switch module of the capacitance vibration elimination circuit.

In some embodiments, the power device comprises a radio frequency amplifier.

In some embodiments, the switch module comprises a first switch;

the control end of the first switch is electrically connected with the control module; the public end of the first switch is electrically connected with the first power supply module; the first connecting end of the first switch is electrically connected with the second power supply module; and the second connecting end of the first switch is electrically connected with each stage of amplifying circuit of the radio frequency amplifier.

In some embodiments, the switch module comprises a first switch and at least one second switch;

the control end of the first switch is electrically connected with the control module; the public end of the first switch is electrically connected with the first power supply module; the first connecting end of the first switch is electrically connected with the second power supply module; the second connecting end of the first switch is electrically connected with a primary amplifying circuit of the radio frequency amplifier;

the first connecting end of the second switch is electrically connected with the first power supply module; the second connecting end of each second switch is electrically connected with other stages of amplifying circuits of the radio frequency amplifier in a one-to-one correspondence manner; and the control end of the second switch is electrically connected with the control module.

In some embodiments, the power supply further comprises a radio frequency transceiving control unit, wherein the radio frequency transceiving control module is electrically connected with the control module and the first power supply module respectively;

the radio frequency transceiving control module is used for controlling the state of the first power supply module according to the working mode of the radio frequency amplifier and indicating the control module to control the switch module to electrically connect the first power supply module with the radio frequency amplifier when the state of the first power supply module is a power supply state; and when the control module is indicated that the first power supply module is in a non-power supply state, the control module controls the switch module to electrically connect the second power supply module with the capacitor.

In a third aspect, an embodiment of the present disclosure further provides an electronic device, including the power device module according to any embodiment of the second aspect.

In a fourth aspect, an embodiment of the present disclosure further provides a method for eliminating capacitive vibration, which is applied to the power device module described in any embodiment of the second aspect, and the method includes:

determining a state of a first power module;

when the first power supply module is in a power supply state, controlling the switch module to electrically connect the first power supply module with the radio frequency amplifier;

and when the first power supply module is in a non-power supply state, controlling the switch module to electrically connect the second power supply module with the capacitor.

The capacitor vibration elimination circuit provided in the embodiment of the disclosure comprises a control module, a switch module, a first power module, a second power module and a capacitor. The control module is electrically connected with the switch module; the first power supply module and the second power supply module are grounded through the capacitor; the switch module and the first power supply module are electrically connected with the capacitor; the second power supply module is electrically connected with the capacitor through the switch module; the control module is used for controlling the switch module to electrically connect the second power supply module with the capacitor when the first power supply module is not powered. The control module controls the switch-off of the switch, and the second power supply supplies power to the capacitor when the first power supply module does not supply power to the capacitor, so that the stability of the voltage of the capacitor is ensured. The embodiment of the disclosure can fundamentally solve the noise interference caused by the capacitance vibration to the circuit without using a noise reduction capacitor, and the cost required in the process of solving the capacitance vibration problem is lower, and the repeated noise condition can not occur.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic structural diagram of a capacitance vibration elimination circuit according to an embodiment of the disclosure;

fig. 2 is a schematic structural diagram of another capacitance vibration elimination circuit according to an embodiment of the disclosure;

fig. 3 is a circuit diagram of a power device module according to an embodiment of the disclosure;

fig. 4 is a schematic flow chart of a method for eliminating capacitive vibration according to an embodiment of the disclosure.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a more detailed description of the present disclosure is given below in conjunction with the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present disclosure, and not all embodiments. The specific embodiments described herein are merely illustrative of the disclosure and are not intended to be limiting. All other embodiments derived by one of ordinary skill in the art from the described embodiments of the disclosure are intended to be within the scope of the disclosure.

The embodiment of the present disclosure provides a capacitance vibration elimination circuit, and fig. 1 is a schematic structural diagram of the capacitance vibration elimination circuit provided in the embodiment of the present disclosure, as shown in fig. 1, including: the circuit comprises a control module 11, a switch module 12, a first power supply module 13, a second power supply module 14 and a capacitor 15.

The control module 11 is electrically connected with the switch module 12, the first power module 13 and the second power module 14 are grounded through a capacitor 15, both the switch module 12 and the first power module 13 are electrically connected with the capacitor 15, and the second power module 14 is electrically connected with the capacitor 15 through the switch module 12. The control module 11 is configured 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.

Specifically, the control module 11 can obtain power supply conditions of the first power module 13 and the second power module 14, and send a control signal to the switch module 12 electrically connected thereto to control on/off of the switch module 12. The switch module 12 is electrically connected to 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 acquires that the first power module 13 is in a non-power supply state, the control switch module 12 is turned on, at this time, the second power module 14 is turned on with the capacitor 15 to form a loop, and the second power module 14 supplies power to the capacitor 15.

If the first power module 13 recovers to supply power to the capacitor 15, the control module 11 sends a control signal to the switch module 12 again, the switch module 12 is controlled to be disconnected, the second power module 14 is disconnected from the capacitor 15, the second power module 14 does not supply power to the capacitor 15 any more, and the first power module 13 continues to supply power to the capacitor 15. The voltage across the capacitor 15 is kept stable and no voltage drop occurs.

According to the embodiment of the disclosure, the control module sends the control signal, the switch module selects the power supply to the capacitor to continuously supply power to the capacitor, so that the voltage at two ends of the capacitor is ensured to be always stable, and the condition that the voltage at two ends of the capacitor is changed to cause the vibration of the capacitor is avoided. The embodiment of the disclosure can fundamentally solve the noise interference caused by the capacitance vibration to the circuit without using a noise reduction capacitor, and the cost required in the process of solving the capacitance vibration problem is lower, and the repeated noise condition can not occur.

In some embodiments, fig. 2 is a schematic structural diagram of another capacitance vibration elimination circuit provided in the embodiments of the present disclosure, and as shown in fig. 2, the switch module 12 includes a first switch 121. The control end of the first switch 121 is electrically connected to the control module, the common end of the first switch 121 is electrically connected to the first power module 13, the first connection end of the first switch 121 is electrically connected to the second power module 14, and the second connection end of the first switch 121 is electrically connected to the power device 161.

Specifically, the control terminal of the first switch 121 receives a control signal sent by the control module 11, and selects a power module for supplying power to the capacitor 15. The common terminal of the first switch 121 is electrically connected to the first power supply module and also electrically connected to the capacitor 15 on the first power supply module side. The first connection end of the first switch 121 is electrically connected to the second power module 14, when the first power module 13 is in a non-power-supply mode, the control module 11 sends a control signal to the first switch 121 to control the first end of the first switch 121 and the second power module 14 to be in a conduction state, and the second power module 14 is connected to the capacitor 15 on the first power module side to supply power to the capacitor 15. When the first power module 13 is in the power supply mode, the control module 11 sends a control signal to the first switch 121 to control the first end of the first switch 121 and the second power module 14 to be in the off state, the second power module 14 does not supply power to the capacitor 15 any more, and the first power module 13 supplies power to the capacitor 15. When the first power module 13 is in the power supply mode, the second connection terminal of the first switch 121 and the power device 161 are in a conducting state; when the first power module 13 is in the non-power mode, i.e. the power device 161 is not working, no power is needed, and the second connection terminal of the first switch 121 is disconnected from the power device 161.

In some embodiments, as shown in fig. 2, at least one second switch 122 is further included, a first connection end of the second switch 122 is electrically connected to the first power module 13, a second connection end of the second switch 122 is electrically connected to the power device 162, and a control end of the second switch 122 is electrically connected to the control module 11.

Specifically, the second switch 122 receives a control signal from the control module 11, when the first power module 13 is in the power supply mode, the first power module 13 needs to supply power to the power device 162, the second switch 122 is in the on state, and the first power module 13 supplies power to the power device 162 through the second switch 122. When the first power module 13 is in the non-power-supply state, the power device 162 does not need to be supplied with power, the control module 11 is electrically connected to the second switch 122, and the control module 11 controls the second switch 122 to be turned off. When the power device 162 works, the first power module 13 supplies power to the power device 162 again, and the control module 11 controls the second switch 122 to be turned on. The first power module 13 supplies power to the power device 162 only when the power device is in the working state, so that the intelligent power-saving effect can be achieved, and waste caused by leakage current is avoided.

Fig. 3 is a circuit diagram of a power device module according to an embodiment of the present disclosure, and as shown in fig. 3, the power device module includes a power device 16 and a capacitance vibration elimination circuit according to any of the embodiments. The power device 16 is electrically connected to the first power module 13 through the switch module 12 of the capacitive vibration canceling circuit.

Specifically, a circuit with higher power usually includes a plurality of power devices 16, because the power devices 16 are mainly used as electronic devices with high power in the aspects of electric energy conversion of power equipment and control circuits, and usually the current and voltage are higher, and the circuit processing actions such as frequency conversion, voltage transformation, current transformation, power management and the like are performed. In such circuits, a large amount of capacitors are used to ensure the stability of the voltage, but the capacitors are also prone to cause the vibration, so that a capacitor vibration elimination circuit is more needed. The power device 16 can be powered by the first power module 13, and is electrically connected to the first power module 13 through the switch module 12, when the first power module 13 is in a non-power-supply mode and cannot supply power to the capacitor, the switch module 12 controls the conduction between the second power module 14 and the capacitor, the second power module supplies power to the capacitor, and the voltage across the capacitor 15 is kept stable.

In some embodiments, the power device comprises a radio frequency amplifier.

In particular, the radio frequency amplifier may convert a low power radio frequency signal to a higher power signal. The important function of an rf amplifier is to amplify the power and obtain sufficient signal strength to radiate the signal without distorting the process signal. The rf amplifier may include a series of amplifier driver stages, intermediate power amplifier stages, and final power amplifier stages to achieve the required amplification power. As an example, fig. 3 shows that the power device 16 is a radio frequency amplifier, and includes a driver stage portion 162 and an amplifier stage portion 161, which perform power amplification on an input radio frequency signal and output the radio frequency signal with a required power.

When the radio frequency amplifier works in the time division duplex mode, the frequency band of the time division duplex mode is turned on when the time slot is transmitted and turned off when the time slot is received in order to save power, and the frequency of the turning on and off falls within the range of audio frequency, so that the condition of capacitance vibration can be generated.

Therefore, when the output voltage of the first power module 13 in the time division duplex mode does not exist all the time, the voltage of the first power module 13 may decrease from about 3.4V to 0V in one period, and the voltage across the capacitor needs to be kept stable and cannot decrease to 0V. When the first power module 13 is in the non-power supply mode, the radio frequency amplifier can supply power to the capacitor through the second power module 14, so that the condition that the voltages at two ends of the capacitor are unstable can be avoided, and the problem of capacitor vibration is solved.

In some embodiments, as shown in fig. 3, the switch module 12 includes a first switch 121. The control end of the first switch 121 is electrically connected with the control module 11, and the common end of the first switch 121 is electrically connected with the first power supply module 13; the first connection end of the first switch 121 is electrically connected to the second power module 14, and the second connection end of the first switch 121 is electrically connected to each stage of the amplifying circuit of the rf amplifier 16.

The first switch 121 is controlled by the control module 11, when the first power module is in the power supply mode, a second connection end of the first switch is connected to the driver stage portion 162 and the amplifier stage portion 161 of the rf amplifier 16, the first power module 13 supplies power to each stage of the amplifier circuit of the rf amplifier 16, and the first power module 13 supplies power to the capacitor 15. The first connection end of the first switch 121 is disconnected from the second power module 14. If the first power module is in the non-power-supply mode, the second connection terminal of the first switch is disconnected from the driving stage 162 and the amplifying stage 161 of the rf amplifier 16, 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, so as to prevent the voltage of the capacitor 15 from dropping and generating vibration.

In some embodiments, as shown in fig. 3, the switch module 12 includes a first switch 121 and at least one second switch 122. The control end of the first switch 121 is electrically connected to the control module 11, the common end of the first switch 11 is electrically connected to the first power module 13, the first connection end of the first switch 121 is electrically connected to the second power module 14, and the second connection end of the first switch 121 is electrically connected to the first-stage amplifying circuit 161 of the rf amplifier 16. The first connection end of the second switch 122 is electrically connected to the first power module 13, the second connection end of each second switch 162 is electrically connected to the other stages of the amplifying circuits of the rf amplifier 16 in a one-to-one correspondence manner, and the control end of the second switch 122 is electrically connected to the control module 11.

Illustratively, the first-stage amplifying circuit 161 in fig. 3 is an amplifying stage part of the radio frequency amplifier, and a driving stage part 162 of the radio frequency amplifier is further provided in front of the amplifying stage part. The first switch is connected to the first stage amplifier circuit 161, and the second switch is connected to the driver stage 162 of the rf amplifier. When the rf amplifier 16 operates in the tdd mode, in order to save power, the first power module 13 only supplies power when the rf amplifier 16 transmits a signal, and the first power module 13 stops supplying power when the rf amplifier 16 receives a signal, thereby achieving the power saving effect.

Therefore, if the first power module 13 is in the power supply mode when the rf amplifier 16 transmits a signal, the first power module 13 needs to supply power to each stage of the amplifying circuit of the rf amplifier 16, and at this time, the first power module 13 supplies power to the amplifying stage 161 of the rf amplifier 16 through the first switch 121, supplies power to the driving stage 162 of the rf amplifier 16 through the second switch 122, and supplies power to the capacitor 15, and the capacitor 15 is used as an energy storage filter, so as to prevent the output signal of the circuit from being unstable. If the first power module 13 is in the non-power-supply mode when the rf amplifier 16 receives the signal, the first power module 13 does not need to supply power to each stage of the amplifying circuit of the rf amplifier 16, but because 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. According to actual requirements, when the first power module 13 is in a non-power supply state, the second switch is controlled to be disconnected, so that leakage current can be prevented, and electric energy can be saved.

In some embodiments, as shown in fig. 3, the power supply further includes an rf transceiver control unit, and the rf transceiver control module 17 is electrically connected to the control module 11 and the first power module 13, respectively.

The rf transceiving control module 17 is configured to control a state of the first power module 13 according to a working mode of the rf amplifier 16, and instruct the control module 11 to control the switch module 12 to electrically connect the first power module 13 with the rf amplifier 16 when the state of the first power module 13 is a power supply state. When the state of the first power module 13 is the non-power-supply state, the control module 11 is instructed to control the switch module 11 to electrically connect the second power module 14 with the capacitor 15.

The rf transceiving control module 17 can control the operation mode of the rf amplifier 16 and the on/off of the switch module 12, and control the power supply state of the first power module 13 according to the operation state of the rf amplifier 16. Because the rf amplifier may have multiple operating modes, including a time division duplex mode and a frequency division duplex mode, but in the time division duplex mode, when the rf amplifier does not need to supply power at the time of receiving a signal, in order to save power, the rf transceiver control module 17 will send out the transmission mode of the current signal, and will control the switch module 12 to disconnect the first power module 13 from the rf amplifier 16, and the first power module 13 is in the non-power-supply mode, and control the switch module 12 to connect the second power module 14 with the capacitor 15, and the second power module 14 supplies power. When the time is not in the time division duplex mode, the rf transceiving control module 17 controls the switch module 12 to connect the first power module 13 and the rf amplifier 16, and disconnect the second power module 14 from the capacitor 15. The whole power module can work normally, meanwhile, the voltage at two ends of the capacitor does not change to cause vibration, and the purpose of saving power can be achieved.

In some embodiments, the first power module 13 is connected to two capacitors, and the capacitors are respectively grounded, and the second power module 14 is connected to two capacitors, and the capacitors are respectively grounded. The capacitor provided on the power supply bypass generally functions to filter out fluctuations in the supply voltage. The small capacitor filters high frequency, the large capacitor filters low frequency, and also provides a certain voltage reserve for the needs of subsequent circuits. Different capacitance sizes can be selected by arranging a plurality of capacitors, and different waveforms can be filtered. In the present disclosure, the number and size of the capacitors are not limited, and may be selected according to circuit requirements.

In some embodiments, the control module 11 is further connected to a third power module 18, configured to supply power to the control module 11, which may be selected according to actual requirements, for example, as shown in fig. 3, the third power module 18 may be a 1.8V dc power supply, and supplies power to the control module 11.

The embodiment of the disclosure further provides an electronic device including the power device module according to any of the above embodiments. Since the present disclosure includes the power device module in any of the above embodiments, the same or corresponding beneficial effects as those of the power device modules described in the above embodiments are obtained, and are not described herein again. The electronic device may be various electronic devices such as a mobile phone and a computer, which is not limited in this disclosure.

The embodiment of the disclosure also provides a capacitance vibration elimination method. Fig. 4 is a schematic flow chart of a method for eliminating capacitive vibration according to an embodiment of the present disclosure, and as shown in fig. 4, the method for eliminating capacitive vibration is applicable to the power device module according to any of the embodiments, and the method for eliminating capacitive vibration includes:

and S110, determining the state of the first power supply module.

The first power module has a plurality of operating states including a powered state and an unpowered state. In the power supply state, the power device and the capacitor connected with the power device can be supplied with power; in the non-power-supply state, power does not need to be supplied to the power device, and at the moment, power cannot be supplied to the capacitor connected with the power device, so that the state of the first power module needs to be determined.

And S120, when the state of the first power supply module is a power supply state, controlling the switch module to electrically connect the first power supply module with the radio frequency amplifier.

If the first power supply module is determined to be in a power supply state, the switch module is controlled to conduct the connection between the first power supply module and the radio frequency amplifier, the first power supply module can provide required electric quantity for the radio frequency amplifier, and meanwhile, power can be supplied to a capacitor connected with the first power supply module.

And S130, when the state of the first power supply module is the non-power supply state, controlling the switch module to electrically connect the second power supply module with the capacitor.

If the first power supply module is determined to be in a non-power supply state, the switch module is controlled to conduct the connection between the second power supply module and the radio frequency amplifier, the first power supply module cannot supply power to the capacitor connected with the first power supply module, and at the moment, the second power supply module supplies power to the capacitor to prevent voltage change at two ends of the capacitor.

Firstly, whether the state of the first power supply module is a power supply mode or a non-power supply mode is judged, and then the on-off of the control switch module is determined according to different states of the first power supply module. If the state of the first power supply module is in a power supply mode, at the moment, the switch module is controlled to conduct the first power supply module and the radio frequency amplifier, the first power supply module can supply power for the radio frequency amplifier and supply power for a capacitor connected with the radio frequency amplifier, and the second power supply module is in a disconnected state with the capacitor on the side of the first power supply module. If the state of the first power supply module is in a non-power supply state, the control switch module disconnects the connection between the first power supply module and the radio frequency amplifier, the connection between the second power supply module and the capacitor on the side of the first power supply module is conducted, the second power supply module replaces the first power supply module to supply power for the capacitor, the voltage at two ends of the capacitor cannot change due to the change of the state of the first power supply module, the capacitor can be always kept stable, the voltage change cannot occur, and the vibration condition caused by the frequency change can be generated.

According to the embodiment of the disclosure, the control module sends the control signal, the switch module selects the power supply for the capacitor, and the power is continuously supplied to the capacitor, so that the voltage at two ends of the capacitor is ensured to be always stable, and the condition that the voltage at two ends of the capacitor changes to cause the vibration of the capacitor is avoided. The embodiment of the disclosure can fundamentally solve the noise interference caused by the capacitance vibration to the circuit without using a noise reduction capacitor, and has lower cost and no repeated noise in the process of solving the capacitance vibration problem.

In some embodiments, the capacitive shock mitigation method further comprises: the first switch module is controlled to control the electric connection between the first power supply module and the radio frequency amplifier, and the electric connection between the second power supply module and the capacitor.

Specifically, on-off selection of the first switch is controlled according to the determined state of the first power supply module. If the state of the first power supply module is in a power supply mode, at the moment, the first switch is controlled to conduct the first power supply module and the radio frequency amplifier, the first power supply module supplies power to the radio frequency amplifier and supplies power to a capacitor connected with the radio frequency amplifier, and the second power supply module is in a disconnected state with the capacitor on the side of the first power supply module. If the first power supply module is in a non-power supply state, the first switch is controlled to disconnect the first power supply module from the radio frequency amplifier, the second power supply module is connected with the radio frequency amplifier, and the second power supply module supplies power to the radio frequency amplifier and supplies power to a capacitor connected with the radio frequency amplifier. No matter what state the first power module is in, the voltage at two ends of the capacitor cannot change, and the capacitor is prevented from shaking due to voltage change.

In some embodiments, the capacitive shock mitigation method further comprises: and controlling the second switch to control the electrical connection of the first power supply module and the radio frequency amplifier.

Specifically, when the state of the first power module is in the power supply mode, the second switch is controlled to conduct the connection between the first power module and the radio frequency amplifier, so that the first power module directly supplies power to the radio frequency amplifier. When the first power supply module is in a non-power supply mode, the second switch is controlled to disconnect the first power supply module from the radio frequency amplifier, the first power supply module cannot supply power to the radio frequency amplifier, the radio frequency amplifier does not need to supply power, and the second switch is turned off to avoid current leakage to the radio frequency amplifier to cause current waste. In the present application, the number of the second switches is not limited, and may be selected according to the power device.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than others, combinations of features of different embodiments are meant to be within the scope of the disclosure and form different embodiments.

Although the embodiments of the present disclosure have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present disclosure, and such modifications and variations fall within the scope defined by the appended claims.

Claims (10)

1. A capacitive shock absorber circuit, comprising:

the power supply comprises 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 with the switch module; the first power supply module and the second power supply module are grounded through the capacitor; the switch module and the first power supply module are electrically connected with the capacitor; the second power supply module is electrically connected with the capacitor through the switch module; the control module is used for controlling the switch module to electrically connect the second power supply module with the capacitor when the first power supply module is not powered.

2. The capacitive shock absorber circuit of claim 1, wherein the switch module comprises a first switch;

the control end of the first switch is electrically connected with the control module; the public end of the first switch is electrically connected with the first power supply module; the first connecting end of the first switch is electrically connected with the second power supply module; the second connection end of the first switch is electrically connected with the power device.

3. The capacitive shock absorber circuit of claim 2, further comprising at least one second switch, a first connection of the second switch being electrically connected to the first power module; the second connecting end of the second switch is electrically connected with the power device; and the control end of the second switch is electrically connected with the control module.

4. A power device module comprising a power device and the capacitive vibration canceling circuit of any one of claims 1-3;

the power device is electrically connected with the first power supply module through a switch module of the capacitance vibration elimination circuit.

5. The power device module of claim 4, wherein the power device comprises a radio frequency amplifier.

6. The power device module of claim 5, wherein the switch module comprises a first switch;

the control end of the first switch is electrically connected with the control module; the public end of the first switch is electrically connected with the first power supply module; the first connecting end of the first switch is electrically connected with the second power supply module; and the second connecting end of the first switch is electrically connected with each stage of amplifying circuit of the radio frequency amplifier.

7. The power device module of claim 5, wherein the switch module comprises a first switch and at least one second switch;

the control end of the first switch is electrically connected with the control module; the public end of the first switch is electrically connected with the first power supply module; the first connecting end of the first switch is electrically connected with the second power supply module; the second connecting end of the first switch is electrically connected with a primary amplifying circuit of the radio frequency amplifier;

the first connecting end of the second switch is electrically connected with the first power supply module; the second connecting end of each second switch is electrically connected with other stages of amplifying circuits of the radio frequency amplifier in a one-to-one correspondence manner; and the control end of the second switch is electrically connected with the control module.

8. The power device module of claim 5, further comprising an RF transceiver control unit, wherein the RF transceiver control unit is electrically connected to the control module and the first power module, respectively;

the radio frequency transceiving control module is used for controlling the state of the first power supply module according to the working mode of the radio frequency amplifier and indicating the control module to control the switch module to electrically connect the first power supply module with the radio frequency amplifier when the state of the first power supply module is a power supply state; and when the control module is indicated that the first power supply module is in a non-power supply state, the control module controls the switch module to electrically connect the second power supply module with the capacitor.

9. An electronic device comprising the power device module according to any one of claims 4 to 8.

10. A method for eliminating capacitive vibration, the method being applied to the power device module of any one of claims 4-8, the method comprising:

determining a state of a first power module;

when the first power supply module is in a power supply state, controlling the switch module to electrically connect the first power supply module with the radio frequency amplifier;

and when the first power supply module is in a non-power supply state, controlling the switch module to electrically connect the second power supply module with the capacitor.

Images