Radio frequency circuit and electronic equipment

Abstract

The utility model discloses a radio frequency circuit and electronic equipment, and belongs to the field of radio frequency circuits. The radio frequency circuit comprises an amplifier, at least two power supplies with different output voltages, at least two capacitors with different capacitance values, at least two control switches, a transceiver module and a control module, one power supply is electrically connected to the amplifier through one capacitor and one control switch, the capacitance values of the capacitors corresponding to the power supplies with different output voltages are different, the transceiver module is electrically connected with the control module, the control module is electrically connected with the amplifier, and the at least two control switches are electrically connected to the control module; and under the condition that the transceiver module receives the signal, the control module detects the voltage of the signal to control the target control switch to be switched on, and the other control switches are switched off, so that the power supply electrically connected with the target control switch supplies power to the amplifier, and the target control switch is a control switch electrically connected with the power supply corresponding to the voltage of the signal.

Description

Technical Field

[0001] The present application belongs to the field of radio frequency circuits, and specifically relates to a radio frequency circuit and an electronic device. Background Art

[0002] With the development of science and technology, electronic devices are used more and more widely. Electronic devices can be used to shoot videos, watch images, and communicate remotely. Usually, an antenna is provided on the electronic device, and a radio frequency circuit is provided in the electronic device, and the radio frequency circuit is electrically connected to the antenna. In the related art, the radio frequency circuit includes a power supply, a capacitor, and an amplifier. The power supply and the capacitor are electrically connected, and the capacitor and the amplifier are electrically connected. The power supply supplies power to the amplifier through the capacitor. However, in the related art, in the process of the power supply supplying power to the amplifier, the noise of the capacitor is relatively large. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a radio frequency circuit and an electronic device, which at least solve the problem of high noise of the capacitor.

[0004] In a first aspect, an embodiment of the present application provides a radio frequency circuit, the radio frequency circuit comprising: an amplifier, at least two power supplies with different output voltages, at least two capacitors with different capacitances, at least two control switches, a transceiver module, and a control module;

[0005] One of the power supplies is electrically connected to the amplifier via one of the capacitors and one of the control switches, and the capacitances of the capacitors corresponding to power supplies with different output voltages are different, the transceiver module is electrically connected to the control module, the control module is electrically connected to the amplifier, and at least two of the control switches are electrically connected to the control module;

[0006] When the transceiver module receives a signal, the control module detects the voltage of the signal to control the target control switch to be turned on, and the remaining control switches to be turned off, so that the power supply electrically connected to the target control switch powers the amplifier, and the target control switch is a control switch electrically connected to the power supply corresponding to the voltage of the signal.

[0007] In a second aspect, an embodiment of the present application provides an electronic device, wherein the electronic device includes the radio frequency circuit described in any one of the above-mentioned first aspects.

[0008] In the embodiment of the present application, the transceiver module is electrically connected to the control module, and the control module is electrically connected to the amplifier. Therefore, after the transceiver module receives the signal, the transceiver module can transmit the signal to the control module, and the control module transmits the signal to the amplifier. Since a power supply is electrically connected to the amplifier through a capacitor and a control switch, and the capacitance values ​​of the capacitors corresponding to power supplies with different output voltages are different, at least two control switches are electrically connected to the control module. Therefore, once the transceiver module receives the signal and transmits the signal to the control module, the control module can detect the voltage of the signal and determine the power supply to supply power to the amplifier according to the voltage of the signal, that is, determine the voltage required by the amplifier according to the voltage of the signal, and thus determine the power supply with an output voltage corresponding to the voltage required by the amplifier, thereby controlling the control switch electrically connected to the power supply to be turned on, and the remaining control switches to be turned off, so that the remaining power supplies cannot supply power to the amplifier. That is, in the embodiment of the present application, the voltage of the signal transmitted by the transceiver module can be detected by the control module, and then the power supply corresponding to the voltage can be determined, and the control switch electrically connected to the power supply can be turned on, so that the power supply supplies power to the amplifier, and the current of the power supply flows through the corresponding capacitor, so that the capacitor has a voltage. However, in the present application, the voltage of the signal can be determined in real time, and a suitable power supply can be selected in real time according to the voltage to power the amplifier, so that the voltage transmitted from the power supply that powers the amplifier to the corresponding capacitor changes less, thereby reducing the noise of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram showing a radio frequency circuit in the related art;

[0010] Figure 2 A schematic diagram showing voltage variation of a capacitor in a radio frequency circuit in the related art;

[0011] Figure 3 A schematic diagram showing a radio frequency circuit provided in an embodiment of the present application;

[0012] Figure 4 A schematic diagram showing voltage changes of a capacitor in a radio frequency circuit provided in an embodiment of the present application.

[0013] Reference numerals:

[0014] 10: amplifier; 20: power supply; 30: capacitor; 40: control switch; 50: transceiver module; 60: control module; 61: coupling unit; 62: detection unit; 70: resistor; 80: inductor; 90: antenna. DETAILED DESCRIPTION

[0015] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0016] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0017] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0018] Before explaining the radio frequency circuit provided in the embodiment of the present application, the application scenario of the radio frequency circuit provided in the embodiment of the present application is first specifically described: In the related art, such as Figure 1 As shown, the RF circuit includes a power supply, a transceiver module, a capacitor and an amplifier; the transceiver module is electrically connected to the amplifier, the power supply is electrically connected to the amplifier through the capacitor, and the power supply supplies power to the amplifier so that the amplifier operates. The power supply provides voltage to the amplifier so that the amplifier is powered on. However, in the process of receiving or transmitting signals in the RF circuit, the voltage required by the receiving signal amplifier is different from the voltage required by the transmitting signal amplifier, and the voltage required for the transmitting signal is greater than the voltage required for the receiving signal, so that the voltage transmitted to the capacitor varies greatly, for example, Figure 2 As shown, T1 represents a time slot for transmitting a signal, T2 represents a time slot for receiving a signal, and so on. Figure 2It can be seen that during the transmission and reception process, the voltage between two adjacent time slots of the capacitor may be the maximum voltage and the minimum voltage, and the changing voltage at both ends of the capacitor produces mechanical deformation, which drives the air to vibrate and generate noise. In related technologies, there may be a large voltage difference between the capacitors in two adjacent time slots, resulting in a large noise problem on the capacitor.

[0019] like Figure 3 As shown, the radio frequency circuit includes: an amplifier 10, at least two power supplies 20 with different output voltages, at least two capacitors 30 with different capacitances, at least two control switches 40, a transceiver module 50 and a control module 60. A power supply 20 is electrically connected to the amplifier 10 through a capacitor 30 and a control switch 40, and the capacitances of the capacitors 30 corresponding to the power supplies 20 with different output voltages are different. The transceiver module 50 is electrically connected to the control module 60, and the control module 60 is electrically connected to the amplifier 10. At least two control switches 40 are electrically connected to the control module 60; when the transceiver module 50 receives a signal, the control module 60 detects the voltage of the signal to control the target control switch 40 to be turned on, and the remaining control switches 40 are turned off, so that the power supply 20 electrically connected to the target control switch 40 supplies power to the amplifier 10, and the target control switch 40 is the control switch 40 electrically connected to the power supply 20 corresponding to the voltage of the signal.

[0020] In an embodiment of the present application, the transceiver module 50 is electrically connected to the control module 60, and the control module 60 is electrically connected to the amplifier 10. Therefore, after the transceiver module 50 receives the signal, the transceiver module 50 can transmit the signal to the control module 60, and the control module 60 transmits the signal to the amplifier 10. Since a power supply 20 is electrically connected to the amplifier 10 via a capacitor 30 and a control switch 40, and the capacitance of the capacitor 30 corresponding to power supplies 20 with different output voltages is different, at least two control switches 40 are electrically connected to the control module 60. Therefore, once the transceiver module 50 receives a signal and transmits the signal to the control module 60, the control module 60 can detect the voltage of the signal and determine the power supply 20 that supplies power to the amplifier 10 according to the voltage of the signal, that is, determine the voltage required by the amplifier 10 according to the voltage of the signal, and thereby determine the power supply 20 with an output voltage corresponding to the voltage required by the amplifier 10, thereby controlling the control switch 40 electrically connected to the power supply 20 to be turned on, while the remaining control switches 40 are turned off, so that the remaining power supplies 20 cannot supply power to the amplifier 10. That is, in the embodiment of the present application, the voltage of the signal transmitted by the transceiver module 50 can be detected by the control module 60, and then the power supply 20 corresponding to the voltage can be determined, and the control switch 40 electrically connected to the power supply 20 can be turned on, so that the power supply 20 supplies power to the amplifier 10, and the current of the power supply 20 flows through the corresponding capacitor 30, so that the capacitor 30 has a voltage. However, in the present application, the voltage of the signal can be determined in real time, and the appropriate power supply 20 can be selected in real time according to the voltage to power the amplifier 10, so that the voltage transmitted from the power supply 20 that supplies power to the amplifier 10 to the corresponding capacitor 30 changes less, thereby reducing the noise of the capacitor 30.

[0021] For example, the capacitors 30 are CH, CM and CL respectively, the power supplies 20 are DC-DC H, DC-DC M and DC-DCL respectively, DC-DC H is electrically connected to the amplifier 10 through CH and the first control switch 40, DC-DC M is electrically connected to the amplifier 10 through CM and the second control switch 40, DC-DC L is electrically connected to the amplifier 10 through CL and the third control switch 40, each control switch 40 is electrically connected to the control module 60, and the control module 60 is electrically connected to the transceiver module 50 and the amplifier 10 respectively. Once the transceiver module 50 transmits the signal to the control module 60, the control module 60 detects that the signal is weak, that is, the voltage of the signal is low, and the control module 60 controls the first control switch 40 to be turned on, so that the DC-DC H supplies power to the amplifier 10. In this process, the DC-DC H will cause the voltage on CH to change, but the voltage change is small. At the next time, if the control module 60 detects that the signal is strong, that is, the voltage of the signal is high, the control module 60 controls the third control switch 40 to be turned on, so that the DC-DC L supplies power to the amplifier 10. In this process, the DC-DC L will cause the voltage on CL to change, but the voltage change is small. Figure 4 As shown, the voltage changes on CH, CM and CL are small, so that the noise of capacitor 30 is reduced. Among them, H represents high, M represents medium, and L represents low.

[0022] In addition, Figure 2 and Figure 4 By comparison, it can be clearly seen that in the related art, the voltage on capacitor 30C0 varies between V5 and V0, while in the embodiment of the present application, the voltage on capacitor 30CH varies between V5 and V4, the voltage on capacitor 30CM varies between V3 and V2, and the voltage on capacitor 30CL varies between V1 and V0, so that the voltage change on each capacitor 30 is small, thereby reducing the noise of capacitor 30.

[0023] In addition, in the embodiment of the present application, the power supply 20 may be a DC-DC power supply.

[0024] In addition, in the embodiment of the present application, the output voltage of any one of the at least two power supplies 20 is different from the output voltage of the remaining power supplies 20 , and the capacitance of any one of the at least two capacitors 30 is different from the capacitance of the remaining capacitors 30 .

[0025] In addition, in the embodiment of the present application, the number of capacitors 30 can be set according to actual needs, for example, the number of capacitors 30 is 3, and for another example, the number of capacitors 30 is 5. The specific number of capacitors 30 is not limited in the embodiment of the present application. In addition, the number of power supplies 20 can be set according to actual needs, for example, the number of power supplies 20 is 3, and for another example, the number of power supplies 20 is 5. The specific number of power supplies 20 is not limited in the embodiment of the present application. In addition, the number of control switches 40 can be set according to actual needs, for example, the number of control switches 40 is 3, and for another example, the number of control switches 40 is 5. The specific number of control switches 40 is not limited in the embodiment of the present application. Among them, the number of power supplies 20 can be equal to the number of capacitors 30, and the number of capacitors 30 is equal to the number of control switches 40.

[0026] In addition, in some embodiments, a power supply 20 is electrically connected to a first end of a capacitor 30 , a second end of the capacitor 30 is grounded, the first end of the capacitor 30 is electrically connected to a control switch 40 , and the control switch 40 is electrically connected to the amplifier 10 .

[0027] In addition, in some embodiments, among any two capacitors 30, the capacitance of the first capacitor 30 is greater than the capacitance of the second capacitor 30, and the output voltage of the power supply 20 electrically connected to the first capacitor 30 is greater than the output voltage of the power supply 20 electrically connected to the second capacitor 30.

[0028] Through such a setting, once the control module 60 receives the signal from the transceiver module 50, the control module 60 determines the voltage required by the amplifier 10 according to the voltage of the signal, thereby determining the power supply 20 with an output voltage corresponding to the voltage required by the amplifier 10, thereby controlling the control switch 40 electrically connected to the power supply 20 to be turned on, while the remaining control switches 40 are turned off, so that the remaining power supplies 20 cannot power the amplifier 10, and the output voltage of the power supply 20 electrically connected to the turned-on control switch 40 matches the capacitance of the capacitor 30. For example, if the power supply 20 provides a larger voltage, the larger voltage is transmitted to the capacitor 30 with a larger capacitance, and if the power supply 20 provides a smaller voltage, the smaller voltage is transmitted to the capacitor 30 with a smaller capacitance, thereby ensuring that the voltage on each capacitor 30 is adapted to the capacitance of the capacitor 30, and then the voltage on each capacitor 30 changes less, so that the noise of the capacitor 30 is smaller. That is, by setting it in any two capacitors 30, the capacitance of the first capacitor 30 is greater than the capacitance of the second capacitor 30, and the output voltage of the power supply 20 electrically connected to the first capacitor 30 is greater than the output voltage of the power supply 20 electrically connected to the second capacitor 30, it can be helpful to reduce the noise of the capacitor 30.

[0029] In addition, in some embodiments, the RF circuit may further include at least two resistors 70; a first end of a resistor 70 is electrically connected to a control switch 40, and a second end of each resistor 70 is electrically connected to the control module 60, so that the control module 60 is electrically connected to at least two control switches 40 through at least two resistors 70.

[0030] When the control module 60 controls the control switch 40 to be turned on, the control module 60 provides a voltage to the control switch 40, so that the control switch 40 is turned on, but the power consumed by the branch where the control switch 40 is located is relatively large. In the embodiment of the present application, the first end of a resistor 70 is electrically connected to a control switch 40, and the second end of each resistor 70 is electrically connected to the control module 60, which is equivalent to connecting a control switch 40 in series with a resistor 70, thereby increasing the resistance 70 of the branch where the control switch 40 is located, thereby reducing the power consumption of the branch where the control switch 40 is located. Among them, the power consumption is equal to the square of the current divided by the resistance 70. By setting the resistance 70, it is equivalent to increasing the value of the resistance 70 where the control switch 40 is located, so that the power consumption is reduced when the current remains unchanged.

[0031] In addition, in some embodiments, the control module 60 may include a coupling unit 61 and a detection unit 62; the coupling unit 61 is electrically connected to the transceiver module 50, and the coupling unit 61 is electrically connected to the amplifier 10, the detection unit 62 is electrically connected to the coupling unit 61, and at least two control switches 40 are electrically connected to the detection unit 62; when the transceiver module 50 receives a signal, the coupling unit 61 couples part of the signal to the detection unit 62, so that the detection unit 62 detects the voltage of the signal and controls the target control switch 40 to be turned on.

[0032] Since the coupling unit 61 is electrically connected to the transceiver module 50, and the coupling unit 61 is electrically connected to the amplifier 10, the detection unit 62 is electrically connected to the coupling unit 61, and at least two control switches 40 are electrically connected to the detection unit 62, once the transceiver module 50 receives a signal, the transceiver module 50 can transmit the signal to the coupling unit 61. On the one hand, the coupling unit 61 couples part of the signal to the detection unit 62, and on the other hand, the coupling unit 61 transmits the signal to the amplifier 10. The detection unit 62 can detect the voltage of the signal and determine the voltage required by the amplifier 10, thereby controlling the target switch to be turned on, so that the corresponding power supply 20 supplies power to the amplifier 10. That is, by such a setting, it is convenient to control the control switch 40. Among them, the detection unit 62 can provide a voltage to the control switch 40, so that the control switch 40 is turned on.

[0033] It should be noted that, in the embodiment of the present application, the coupling unit 61 may be a coupler, and the detection unit 62 may be a detector.

[0034] In addition, in some embodiments, the radio frequency circuit may further include at least two inductors 80, and one power supply 20 is electrically connected to one end of a capacitor 30 through an inductor 80. Through such a setting, it is equivalent to that each capacitor 30 can cooperate with an inductor 80, so that when the power supply 20 supplies power to the amplifier 10, the voltage of the power supply 20 passes through the inductor 80 and the capacitor 30, and the inductor 80 cooperates with the capacitor 30 to ensure the stable operation of the power supply 20. That is, by setting the inductor 80, it is beneficial to the stable operation of the power supply 20.

[0035] In addition, in some embodiments, the RF circuit may further include an antenna 90, which is electrically connected to the amplifier 10 and is used to transmit or receive RF signals. By providing the antenna 90, the RF signal can be transmitted or received through the antenna 90, so that the RF circuit can have the function of transmitting and receiving RF, thereby increasing the function of the RF circuit.

[0036] In addition, in some embodiments, the at least two capacitors 30 may include three capacitors 30 , and the capacitances of the three capacitors 30 are 4.7 uF, 2.2 uF, and 1 uF, respectively.

[0037] Among them, for the capacitor 30 with a capacitance of 4.7uF, a 0402 package can be used, and the size of the 0402 package is 1.0mm x0.5mm. For the capacitors 30 with capacitances of 2.2uF and 1uF, a 0201 package can be used, and the specific size of the 0201 package size is 0.6mm x 0.3mm. That is, in the embodiment of the present application, by setting the capacitances of the three capacitors 30 to be 4.7uF, 2.2uF and 1uF respectively, the size of the capacitor 30 package can be smaller, which is conducive to reducing the size of the RF circuit, and further conducive to reducing the noise of the capacitor 30. Among them, the smaller the size of the capacitor 30, the smaller the noise.

[0038] In addition, in the embodiment of the present application, the control switch 40 may be an N-type MOS transistor. By such a configuration, the cost of the radio frequency circuit can be effectively reduced. The gate of the N-type MOS transistor is electrically connected to the control module 60.

[0039] In an embodiment of the present application, the transceiver module 50 is electrically connected to the control module 60, and the control module 60 is electrically connected to the amplifier 10. Therefore, after the transceiver module 50 receives the signal, the transceiver module 50 can transmit the signal to the control module 60, and the control module 60 transmits the signal to the amplifier 10. Since a power supply 20 is electrically connected to the amplifier 10 via a capacitor 30 and a control switch 40, and the capacitance of the capacitor 30 corresponding to power supplies 20 with different output voltages is different, at least two control switches 40 are electrically connected to the control module 60. Therefore, once the transceiver module 50 receives a signal and transmits the signal to the control module 60, the control module 60 can detect the voltage of the signal and determine the power supply 20 that supplies power to the amplifier 10 according to the voltage of the signal, that is, determine the voltage required by the amplifier 10 according to the voltage of the signal, and thereby determine the power supply 20 with an output voltage corresponding to the voltage required by the amplifier 10, thereby controlling the control switch 40 electrically connected to the power supply 20 to be turned on, while the remaining control switches 40 are turned off, so that the remaining power supplies 20 cannot supply power to the amplifier 10. That is, in the embodiment of the present application, the voltage of the signal transmitted by the transceiver module 50 can be detected by the control module 60, and then the power supply 20 corresponding to the voltage can be determined, and the control switch 40 electrically connected to the power supply 20 can be turned on, so that the power supply 20 supplies power to the amplifier 10, and the current of the power supply 20 flows through the corresponding capacitor 30, so that the capacitor 30 has a voltage. However, in the present application, the voltage of the signal can be determined in real time, and the appropriate power supply 20 can be selected in real time according to the voltage to power the amplifier 10, so that the voltage transmitted from the power supply 20 that supplies power to the amplifier 10 to the corresponding capacitor 30 changes less, thereby reducing the noise of the capacitor 30.

[0040] An embodiment of the present application provides an electronic device, which includes the radio frequency circuit in any one of the above embodiments.

[0041] It should be noted that in the embodiments of the present application, electronic devices include but are not limited to controllers, smart devices, terminal products and other devices, where smart devices are, for example, smart phones, smart TVs, smart speakers, smart robots, VR devices, AR devices, XR devices and other devices, and terminal products include personal computers, tablet computers and other products.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0043] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A radio frequency circuit, characterized in that: The radio frequency circuit includes: an amplifier, at least two power supplies with different output voltages, at least two capacitors with different capacitances, at least two control switches, a transceiver module and a control module; One of the power supplies is electrically connected to the amplifier via one of the capacitors and one of the control switches, and the capacitances of the capacitors corresponding to power supplies with different output voltages are different, the transceiver module is electrically connected to the control module, the control module is electrically connected to the amplifier, and at least two of the control switches are electrically connected to the control module; When the transceiver module receives a signal, the control module detects the voltage of the signal to control the target control switch to be turned on, and the remaining control switches to be turned off, so that the power supply electrically connected to the target control switch powers the amplifier, and the target control switch is a control switch electrically connected to the power supply corresponding to the voltage of the signal.

2. The radio frequency circuit according to claim 1, characterized in that: A power supply is electrically connected to a first end of a capacitor, a second end of the capacitor is grounded, the first end of the capacitor is electrically connected to a control switch, and the control switch is electrically connected to the amplifier.

3. The radio frequency circuit according to claim 1, characterized in that: Among any two of the capacitors, the capacitance of the first capacitor is greater than that of the second capacitor, and the output voltage of the power supply electrically connected to the first capacitor is greater than the output voltage of the power supply electrically connected to the second capacitor.

4. The radio frequency circuit according to claim 1, characterized in that: The radio frequency circuit also includes at least two resistors; A first end of one of the resistors is electrically connected to one of the control switches, and a second end of each of the resistors is electrically connected to the control module, so that the control module is electrically connected to at least two of the control switches through at least two of the resistors.

5. The radio frequency circuit according to claim 1, characterized in that: The control module includes a coupling unit and a detection unit; The coupling unit is electrically connected to the transceiver module, and the coupling unit is electrically connected to the amplifier, the detection unit is electrically connected to the coupling unit, and at least two of the control switches are electrically connected to the detection unit; When the transceiver module receives a signal, the coupling unit couples part of the signal to the detection unit, so that the detection unit detects the voltage of the signal and controls the target control switch to be turned on.

6. The radio frequency circuit according to claim 2, characterized in that: The radio frequency circuit further includes at least two inductors, and one of the power supplies is electrically connected to one end of one of the capacitors through one of the inductors.

7. The radio frequency circuit according to claim 1, characterized in that: The radio frequency circuit also includes an antenna, which is electrically connected to the amplifier and is used to transmit or receive radio frequency signals.

8. The radio frequency circuit according to claim 1, characterized in that: At least two of the capacitors include three capacitors, and the capacitances of the three capacitors are 4.7uF, 2.2uF and 1uF respectively.

9. The radio frequency circuit according to claim 1, characterized in that: The control switch is an N-type MOS tube.

10. An electronic device, characterized in that: The electronic device comprises the radio frequency circuit according to any one of claims 1 to 9.

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