Amplifier device

Abstract

The present application discloses an amplifier device, which includes a voltage stabilizing circuit, a first voltage conversion circuit, a first control circuit, and an amplifier circuit. The voltage stabilizing circuit is used to output a first driving voltage. The first voltage conversion circuit is coupled to the voltage stabilizing circuit, and is used to receive the first driving voltage, and output at least one first voltage related to the first driving voltage and one of the first driving voltages as a first operating voltage. The first control circuit is coupled to the first voltage conversion circuit through a first node, and is used to receive the first operating voltage, and generate a first operating signal according to the first operating voltage and a first control signal. The amplifier circuit is coupled to the first control circuit and the voltage stabilizing circuit, and is used to receive the first driving voltage, and generate an output voltage controlled by the first operating signal.

Description

Technical Field

[0001] This application relates to an amplifier device, and more particularly to an amplifier device with adjustable bias voltage. Background Art

[0002] In the prior art, the bias voltage of an amplifier affects its linearity, and thus affects the dynamic range of a signal transceiver. However, the required bias voltage for each amplifier varies with process variations and cannot be accurately obtained through simulation. Summary of the Invention

[0003] To solve the above problems, this application provides an amplifier device, including a voltage stabilization circuit, a first voltage conversion circuit, a first control circuit, and an amplifier circuit. The voltage stabilization circuit is used to output a first driving voltage. The first voltage conversion circuit is coupled to the voltage stabilization circuit, and is used to receive the first driving voltage, and output at least one first voltage related to the first driving voltage and one of the first driving voltages as a first operating voltage. The first control circuit is coupled to the first voltage conversion circuit via a first node, and is used to receive the first operating voltage, and generate a first operating signal according to the first operating voltage and a first control signal. The amplifier circuit is coupled to the first control circuit and the voltage stabilization circuit, and is used to receive the first driving voltage, and generate an output voltage controlled by the first operating signal.

[0004] Another aspect of this application provides an amplifier device, including an amplifier circuit, a first voltage conversion circuit, and a first control circuit. The amplifier circuit is coupled to a voltage input section and is used to receive a first driving voltage. The first voltage conversion circuit includes at least one first voltage dividing unit, a first switch, and a second switch. The at least one first voltage dividing unit is coupled between the voltage input terminal and the reference voltage terminal, and is used to receive the first driving voltage and output at least one first voltage according to the first driving voltage. The first switch is coupled to the voltage input terminal and is used to receive and transmit the first driving voltage as a first operating voltage. The second switch is coupled to the at least one first voltage dividing unit and is used to receive and transmit the at least one first voltage as a first operating voltage. The first control circuit is coupled between the amplifier circuit and the first voltage conversion circuit. The first control circuit is used to receive the first operating voltage to generate a first control signal. The amplifier circuit is used to generate an output voltage according to the first control signal. Brief Description of the Drawings

[0005] Figure 1 It is a functional block diagram of an amplifier device illustrated according to some embodiments of this application.

[0006] Figure 2 It is as shown according to some embodiments of this application Figure 1 a schematic diagram of an ear-worn device.

[0007]

Description of Symbols

[0008] To make the above and other objects, features, and advantages of the present application more obvious and understandable, the description of the attached symbols is as follows:

[0009] 100, 200: Amplifier device

[0010] 110: Voltage regulator circuit

[0011] 1201, 1202, 2201, 2202: Voltage conversion circuit

[0012] 1301, 1302, 2301, 2302: Control circuit

[0013] 140, 240: Amplifier circuit

[0014] 150, 250: Voltage dividing circuit

[0015] 160, 260: Output unit

[0016] 170, 270: Input unit

[0017] C1~C5: Capacitor

[0018] L1: Inductor

[0019] Vin: Input voltage

[0020] Vout: Output voltage

[0021] RFin: Input signal

[0022] RFout: Output signal

[0023] Vcon1, Vcon2: Control signal

[0024] VD1, VD2: Drive voltage

[0025] VO1, VO2: Operating voltage

[0026] OS1, OS2: Operating signal

[0027] N1~N4: Node

[0028] V1~V5: Voltage

[0029] R1~R6: Resistor

[0030] INV1~INV4: Inverter

[0031] T1~T4: Transistor

[0032] 2211, 2212: Voltage dividing unit

[0033] 2221, 2222: Switch group

[0034] SW1~SW5: Switches

[0035] IS: Current source

[0036] 261: Output matching circuit

[0037] 271: Input matching circuit

[0038] 272: Bias circuit Detailed implementation manners

[0039] All the terms used in this specification have their ordinary meanings. The definitions of the above terms in commonly used dictionaries, and the examples of the use of any of the terms discussed herein in the context of this specification are only for illustration and should not limit the scope and meaning of this application. Similarly, this application is not limited only to the various embodiments shown in this specification.

[0040] In this specification, the terms first, second, third, etc. are used to describe the relationships between various components, components, regions, layers, and / or blocks, but these components, components, regions, layers, and / or blocks should not be limited by these terms. These terms are only used to distinguish a single component, component, region, layer, and / or block. Therefore, a first component, component, region, layer, and / or block in this specification may also be referred to as a second component, component, region, layer, and / or block without departing from the spirit of this application. The "and / or" used in this specification includes any one and all combinations of one or more associated items.

[0041] Regarding the "coupled" or "connected" used in this specification, it may refer to two or more components making direct physical or electrical contact with each other, or making indirect physical or electrical contact with each other, and may also refer to two or more components operating or acting on each other.

[0042] Please refer to Figure 1 , Figure 1 , which is a functional block diagram of an amplifier device 100 illustrated according to some embodiments of this application. As Figure 1 shown, the amplifier device 100 includes a voltage regulation circuit 110, a voltage conversion circuit 1201, a voltage conversion circuit 1202, a control circuit 1301, a control circuit 1302, an amplifier circuit 140, a voltage dividing circuit 150, an output unit 160, and an input unit 170.

[0043] In some embodiments, the voltage regulation circuit 110 is used to output a driving voltage VD1, which can be implemented by any form of circuit as long as it can be used to provide the driving voltage VD1, and is within the scope covered by this application.

[0044] In some embodiments, the voltage conversion circuit 1201 is coupled between the voltage regulation circuit 110 and the control circuit 1301. After receiving and converting the driving voltage VD1 output by the voltage regulation circuit 110, it outputs an operating voltage VO1 to the control circuit 1301. In some embodiments, the operating voltage VO1 output by the voltage conversion circuit 1201 is the received driving voltage VD1 (i.e., it is output directly without conversion). In some embodiments, the voltage conversion circuit 1201 may utilize a voltage dividing unit (such as Figure 2 the voltage dividing unit 2211 shown) and a switch group (such as Figure 2 the switch group 2221 shown) to convert the driving voltage VD1 to output an operating voltage VO1 different from the driving voltage VD1. For its detailed settings and operating modes, please refer to the following paragraphs.

[0045] In some embodiments, there is a node N1 between the voltage conversion circuit 1201 and the voltage regulation circuit 110. The voltage conversion circuit 1201 is coupled to the voltage regulation circuit 110 via the node N1. A capacitor C1 is provided between the node N1 and the reference voltage terminal, that is, C1 is coupled between the node N1 and the reference voltage terminal. In some embodiments, the reference voltage terminal is a ground terminal. In this specification, the reference voltage terminal is taken as an example of a ground terminal, but not limited thereto.

[0046] In some embodiments, there is a node N2 between the voltage conversion circuit 1201 and the control circuit 1301. The voltage conversion circuit 1201 is coupled to the control circuit 1301 via the node N2. A capacitor C2 is provided between the node N2 and the reference voltage terminal, that is, C2 is coupled between the node N2 and the reference voltage terminal.

[0047] In some embodiments, the control circuit 1301 is coupled between the voltage conversion circuit 1201 and the amplifier circuit 140. It is used to receive the operating voltage VO1 transmitted from the voltage conversion circuit 1201, and then generate an operating signal OS1 according to the operating voltage VO1 and the control signal Vcon1. For its detailed operating mode, please refer to the following description. In some embodiments, the operating signal OS1 is equal to the operating voltage VO1.

[0048] In some embodiments, the amplifier circuit 140 is coupled to the control circuit 1301 and the voltage regulation circuit 110. It is used to receive the operating signal OS1 transmitted from the control circuit 1301 to generate an output voltage Vout. In some embodiments, the amplifier circuit 140 is coupled to the node N1 via an inductive component (such as: inductor L1) having a high impedance characteristic.

[0049] In some embodiments, the amplifier circuit 140 is configured to receive an input voltage Vin and amplify the input voltage Vin according to an operation signal OS1 to generate an output voltage Vout corresponding to the operation signal OS1. In other words, by adjusting the voltage value of the operation signal OS1 through the voltage conversion circuit 1201 and the control circuit 1301, the linearity of the amplifier circuit 140 can be improved.

[0050] In some embodiments, the voltage dividing circuit 150 is coupled between the voltage regulating circuit 110 and the voltage conversion circuit 1202 and is configured to output a driving voltage VD2 according to a driving voltage VD1.

[0051] In some embodiments, there is a node N3 between the voltage conversion circuit 1202 and the control circuit 1302, and the voltage conversion circuit 1202 is coupled to the control circuit 1302 via the node N3. The voltage conversion circuit 1202 is configured to receive and convert the driving voltage VD2 to output an operation voltage VO2 to the control circuit 1302. After receiving the operation voltage VO2, the control circuit 1302 generates an operation signal OS2 to the amplifier circuit 140 according to the operation voltage VO2 and a control signal Vcon2. In this embodiment, the amplifier circuit 140 amplifies the input voltage Vin according to the operation signals OS1 and OS2 having different voltage values from each other to generate an output voltage Vout corresponding to the operation signals OS1 and OS2. In some embodiments, a capacitor C3 is disposed between the node N3 and a reference voltage terminal, and the capacitor C3 is coupled between the node N3 and the reference voltage terminal. In some embodiments, the control signals Vcon1 and Vcon2 can be generated by a digital control circuit (not shown in the figure). In some embodiments, the coupling manner and operation relationship between the voltage conversion circuit 1202 and the control circuit 1302 are similar to those between the voltage conversion circuit 1201 and the control circuit 1301, and thus will not be described herein again.

[0052] In other embodiments, the voltage conversion circuit 1202 may be directly connected to the voltage stabilizing circuit 110 instead of being connected to the voltage stabilizing circuit 110 via the voltage dividing circuit 150. In other embodiments, the amplifier device 100 may include a combination of one or more voltage conversion circuits and their corresponding control circuits and voltage dividing circuits as described above, and the number thereof is not limited to that shown in the figure. For example, in the amplifier device 100, the voltage dividing circuit 150, the voltage conversion circuit 1202, the control circuit 1302, the output unit 160, and / or the input unit 170 may be omitted. For another example, in addition to the voltage conversion circuit 1201 (which may be collectively referred to as the first path with the subsequent control circuit 1301) and the voltage conversion circuit 1202 (which may be collectively referred to as the second path with the subsequent control circuit), the amplifier device 100 may further include a combination of additional voltage conversion circuits and their corresponding control circuits (i.e., the third path, the fourth path, etc.), and the above combinations are coupled between the voltage stabilizing circuit 110 and the amplifier circuit 140. The detailed connection relationship and operation mode are similar to the description of the voltage conversion circuit 1201 and the control circuit 1301 above, so they will not be elaborated here.

[0053] In some embodiments, the amplifier device 100 further includes an output unit 160 for receiving and generating an output signal RFout according to the output voltage Vout. In some embodiments, the output signal RFout may be transmitted to a mixer (not shown in the figure) or other circuits or components that can be used in conjunction with the amplifier device 100, but the present application is not limited thereto.

[0054] In some embodiments, the amplifier device 100 further includes an input unit 170 for receiving an input signal RFin to generate an input voltage Vin. In some embodiments, the input signal RFin may be transmitted from an antenna or / and a pad of a wire bond, but the present application is not limited thereto.

[0055] Please refer to Figure 2 。 Figure 2 FIG. is a circuit schematic diagram of an amplifier device 200 illustrated according to some embodiments of the present application. Figure 2 The circuit in may be understood as a partial circuit of the amplifier device 100, but the present application is not limited thereto.

[0056] As Figure 2 shown, the voltage conversion circuit 2201 is Figure 1 a feasible embodiment of the voltage conversion circuit 1201 or the voltage conversion circuit 1202 in. The voltage conversion circuit 2201 may include a voltage dividing unit 2211 and a switch group 2221. From Figure 2It can be seen that one end of the switch group 2221 is coupled to the voltage regulator circuit 110 via the node N1 for receiving the voltage V1, and the other end thereof is coupled to the voltage regulator circuit 110 via the voltage dividing unit 2211 for receiving the voltage V2. Therefore, the voltage V1 received by the switch group 2221 is substantially equivalent to the driving voltage VD1, and the voltage V2 received by the switch group 2221 is different from the voltage V1.

[0057] In some embodiments, the voltage dividing unit 2211 includes a resistor R1 and is coupled between the voltage regulator circuit 110 and the reference voltage terminal for receiving the driving voltage VD1 and outputting the voltage V2 to the switch group 2221 according to the driving voltage VD1.

[0058] In some embodiments, the switch group 2221 includes a switch SW1 and a switch SW2 for receiving the voltage V1 and the voltage V2 respectively. When the switch SW1 is turned on, the switch group 2221 outputs the voltage V1 as the operating voltage VO1 to the control circuit 2301. When the switch SW2 is turned on, the switch group 2221 outputs the voltage V2 as the operating voltage VO1 to the control circuit 2301. In some embodiments, the switch SW1 and the switch SW2 are coupled in parallel to the node N2 and are respectively coupled to different ends of the resistor R1. In other words, the switch SW1 is coupled between the voltage regulator circuit 110 (via the node N1) and the node N2, the switch SW2 is coupled between the voltage regulator circuit 110 and the node N2 in series with the voltage dividing unit 2211 (such as the resistor R1), and the switch SW2 is also coupled between the reference voltage terminal and the node N2.

[0059] In some embodiments, the voltage conversion circuit 2202 is Figure 1 a feasible embodiment of the medium voltage conversion circuit 1201 or the voltage conversion circuit 1202, which may include a voltage dividing unit 2212 and a switch group 2222. In some embodiments, the voltage dividing unit 2212 includes a resistor R2 and a resistor R3. A node N4 is provided between the resistor R2 and the resistor R3. The resistor R2 is coupled to the resistor R3 via the node N4, and the two are coupled in series between the voltage dividing circuit 250 and the reference voltage terminal. The voltage dividing unit 2212 is used for receiving and outputting the voltages V4 and V5 to the switch group 2222 according to the driving voltage VD2. Similarly, the voltage V3 received by the switch group 2222 is substantially equivalent to the driving voltage VD2, and the voltages V4 and V5 received by the switch group 2222 are different from the voltage V3.

[0060] In some embodiments, the switch group 2222 includes a switch SW3, a switch SW4 and a switch SW5 for receiving the voltages V3, V4 and V5 respectively. As Figure 2As shown, switch SW3, switch SW4, and switch SW5 are coupled to node N3 and are each coupled to a corresponding end of resistor R2 or resistor R3. For example, switch SW3 is coupled between voltage divider circuit 250 and node N3, switch SW4 is coupled between node N4 and node N3, and switch SW5 is coupled between the reference voltage terminal and node N3. In operation, when switch SW3 is turned on, switch group 2222 outputs voltage V3 as operating voltage VO2 to control circuit 2302. When switch SW4 is turned on, switch group 2222 outputs voltage V4 as operating voltage VO2 to control circuit 2302. When switch SW5 is turned on, switch group 2222 outputs voltage V5 as operating voltage VO2 to control circuit 2302.

[0061] In other embodiments, voltage divider unit 2211 and voltage divider unit 2212 may each include a plurality of resistors connected in series or / and in parallel with each other, and the present application is not limited to the manner shown in the figure.

[0062] In some embodiments, control circuit 2301 is Figure 1 a feasible embodiment of control circuit 1301 or control circuit 1302 in [the context]. Control circuit 2301 may include inverter INV1 and inverter INV2. In some embodiments, inverter INV2 is serially coupled between inverter INV1 and amplifier circuit 240, and both inverter INV1 and inverter INV2 are coupled to node N2 to receive operating voltage VO1. In some embodiments, inverter INV1 is used to receive control signal Vcon1 and cooperate with inverter INV2 to generate operating signal OS1 based on control signal Vcon1 and operating voltage VO1. In some embodiments, when control signal Vcon1 is a high-level signal (e.g., logic 1), the operating signal OS1 received by amplifier circuit 240 is also a high-level signal, and in some embodiments, amplifier circuit 240 can be regarded as being coupled to node N2 at this time. In some embodiments, when control signal Vcon1 is a low-level signal (e.g., logic 0), the operating signal OS1 received by amplifier circuit 240 is also a low-level signal, and in some embodiments, amplifier circuit 240 can be regarded as being coupled to the reference voltage terminal at this time, causing amplifier circuit 240 to be turned off. In the case where amplifier circuit 240 is turned off, the output voltage Vout received by output unit 260 is only related to the drive voltage output by voltage regulator circuit 110 or a voltage signal further transmitted via an inductive component (e.g., inductor L1).

[0063] In some embodiments, the control circuit 2302 is coupled between the node N3 and the amplifier circuit 240 and includes an inverter INV3 and an inverter INV4, wherein the inverter INV3 is configured to receive the control signal Vcon2. Since the detailed coupling relationship and operation of the inverters INV3 and INV4 are similar to those of the inverters INV1 and INV2 in the control circuit 2301, they are not further described here for simplicity.

[0064] In some embodiments, the amplifier circuit 240 is Figure 1 One embodiment of the amplifier circuit 140 includes transistors T1 to T3 coupled in series. In some embodiments, the control terminal of transistor T1 is coupled to the control circuit 2301 for receiving an operating signal OS1. The first terminal of transistor T1 is coupled to the voltage regulator circuit 110 directly or via a high-impedance component (e.g., inductor L1). The second terminal of transistor T1 is coupled to the first terminal of transistor T2. The control terminal of transistor T2 is coupled to the control circuit 2302 for receiving an operating signal OS2. The second terminal of transistor T2 is coupled to the first terminal of transistor T3. The control terminal of transistor T3 is coupled to the input voltage Vin, and the second terminal of transistor T3 is coupled to the reference voltage terminal.

[0065] In other embodiments, when Figure 1 The amplifier device 100 shown does not include the voltage conversion circuit 1202 and the control circuit 1302 (i.e., the aforementioned Figure 1 When a second path (as shown in FIG. 2 ) is used, a corresponding transistor (e.g., transistor T2 corresponding to amplifier circuit 240 shown in FIG. 2 ) can be omitted in amplifier circuit 140 . In other words, the configuration and number of transistors in amplifier circuit 140 can be increased or decreased with different numbers of voltage conversion circuits, and this application is not limited to the configuration shown in the figures.

[0066] In some embodiments, the voltage divider circuit 250 is Figure 1 A feasible embodiment of the voltage divider circuit 150 may include a resistor R4 and a resistor R5. Figure 2 In the illustrated embodiment, resistors R4 and R5 are used to divide the driving voltage VD1 to output a driving voltage VD2. In some embodiments, a first end of resistor R4 is coupled to node N1 and to voltage conversion circuit 2201, and a second end of resistor R4 is coupled to a first end of resistor R5 and to voltage conversion circuit 2202. A first end of resistor R5 is coupled to a second end of resistor R4 and to voltage conversion circuit 2202, and a second end of resistor R5 is coupled to a reference voltage terminal. In other embodiments, voltage divider circuit 250 may include multiple resistors connected in series and / or in parallel, but the present application is not limited thereto.

[0067] In some embodiments, the output unit 260 isFigure 1 A feasible embodiment of the output unit 160. The output unit 260 includes an output matching circuit 261 and a capacitor C4. The capacitor C4 is coupled between the output matching circuit 261 and the output terminal of the amplifier circuit 240 (for example, the first terminal of the transistor T1). Specifically, the capacitor C4 is used to block the DC signal between the amplifier device 200 and the output terminal load, and the output matching circuit 261 is used to perform impedance matching between the amplifier device 200 and the output terminal load. It may include one or more components such as inductors, resistors, capacitors, etc. that are connected in series and / or in parallel with each other. The present application is not limited thereto.

[0068] In some embodiments, the input unit 270 is Figure 1 A feasible embodiment of the input unit 170. The input unit 270 includes an input matching circuit 271 and a bias circuit 272. In some embodiments, the input matching circuit 271 is used to perform impedance matching between the amplifier device 200 and the input terminal load. It may include one or more components such as inductors, resistors, capacitors, etc. that are connected in series and / or in parallel with each other. The present application is not limited thereto. In some embodiments, the input matching circuit 271 is coupled to the amplifier circuit 240 (for example, the control terminal of the transistor T3) via a capacitor C5, where the capacitor C5 is used to block the DC signal between the amplifier device 200 and the input terminal load.

[0069] In addition, as Figure 2 shown, the bias circuit 272 is coupled to the input terminal of the amplifier circuit 240 together with the capacitor C5, and the bias circuit 272 is used to generate a reference fixed voltage such that this reference fixed voltage and the signal transmitted via the capacitor C#5 together serve as the input voltage Vin and are transmitted to the amplifier circuit 240. In some embodiments, the bias circuit 272 may include a transistor T4 and a current source IS. The current source IS is coupled to the first terminal and the control terminal of the transistor T4, and the second terminal of the transistor T4 is coupled to the reference voltage terminal. In some embodiments, the bias circuit 272 is coupled to the amplifier circuit 240 (for example, the control terminal of the transistor T3) via a resistor R6, where the resistor R6 has a relatively high resistance value (for example, 10 kΩ).

[0070] In some embodiments, the transistors T1 to T4 are N-type metal oxide semiconductor field effect transistors (NMOS). In other embodiments, the transistors T1 to T4 may be transistors of the same or different types (for example, bipolar transistors, P-type metal oxide semiconductor field effect transistors... etc.). The present application is not limited thereto.

[0071] In summary, the present application provides amplifier devices 100 and 200. By means of the voltage dividing unit and the switch group in the voltage conversion circuit, different operating voltages are output to the amplifier circuit according to the driving voltage, thereby adjusting the linearity of the amplifier circuit.

[0072] Although this case has been applied as above in an implementation manner, it does not limit this case. Any person skilled in this art can make various changes and modifications without departing from the spirit and scope of this case. Therefore, the protection scope of this case shall be subject to that defined by the appended claims.

Claims

1. An amplifier device, characterized in that: Include: a voltage stabilizing circuit for outputting a first driving voltage; a first voltage conversion circuit coupled to the voltage stabilization circuit, configured to receive the first driving voltage and output at least one first voltage related to the first driving voltage and one of the first driving voltage as a first operating voltage; a first control circuit coupled to the first voltage conversion circuit via a first node, configured to receive the first operating voltage and generate a first operating signal according to the first operating voltage and a first control signal; as well as an amplifier circuit coupled to the first control circuit and the voltage stabilizing circuit, configured to receive the first driving voltage and generate an output voltage under the control of the first operating signal; The first voltage conversion circuit includes: at least one resistor coupled between the voltage stabilizing circuit and a reference voltage terminal; and A plurality of switches are connected in parallel, wherein one end of the switches is coupled to the first node, and the other ends of the switches are respectively coupled to different ends of the at least one resistor.

2. The amplifier device according to claim 1, wherein Also includes: a second voltage conversion circuit coupled to the voltage stabilizing circuit, configured to receive a second driving voltage and output at least one second voltage related to the second driving voltage and one of the second driving voltage as a second operating voltage; as well as A second control circuit is coupled to the second voltage conversion circuit, and is used to receive the second operating voltage and generate a second operating signal according to the second operating voltage and a second control signal.

3. The amplifier device according to claim 2, wherein The second voltage conversion circuit includes a second switch group, and the second switch group is used for switching to transmit one of the at least one second voltage and the second driving voltage.

4. The amplifier device according to claim 2, wherein Also includes: A voltage divider circuit is coupled between the voltage stabilizing circuit and the second voltage conversion circuit, and is used for outputting the second driving voltage according to the first driving voltage.

5. An amplifier device, characterized in that: Include: an amplifier circuit coupled to a voltage input terminal for receiving a first driving voltage; and a first voltage conversion circuit comprising: at least one first voltage dividing unit, coupled between the voltage input terminal and a reference voltage terminal, for receiving the first driving voltage and outputting at least one first voltage according to the first driving voltage; a first switch coupled to the voltage input terminal, for receiving and transmitting the first driving voltage as a first operating voltage; as well as a second switch coupled to the at least one first voltage dividing unit, for receiving and transmitting the at least one first voltage as the first operating voltage; as well as a first control circuit coupled between the amplifier circuit and the first voltage conversion circuit, the first control circuit being configured to receive the first operating voltage to generate a first control signal; The amplifier circuit is used to generate an output voltage according to the first control signal.

6. The amplifier device according to claim 5, wherein The at least one first voltage dividing unit is further configured to receive and output at least one second voltage according to the first driving voltage. The first voltage conversion circuit further comprises: A third switch is coupled to the at least one first voltage dividing unit, and is used to receive and transmit the at least one second voltage as the first operating voltage.

7. The amplifier device according to claim 5, wherein Also includes: a second voltage conversion circuit, comprising: at least one second voltage dividing unit, configured to receive a second driving voltage and output at least one second voltage according to the second driving voltage; a third switch coupled to the voltage input terminal, for receiving and transmitting the second driving voltage as a second operating voltage; as well as a fourth switch coupled to the at least one second voltage dividing unit, for receiving and transmitting the at least one second voltage as the second operating voltage; as well as a second control circuit coupled between the amplifier circuit and the second voltage conversion circuit, the second control circuit being configured to receive the second operating voltage to generate a second control signal; The amplifier circuit is used to generate the output voltage according to the first control signal and the second control signal.

8. The amplifier device according to claim 7, wherein Also includes: A voltage divider circuit is coupled between the voltage input terminal and the second voltage conversion circuit, and is used to generate the second driving voltage according to the first driving voltage.

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