RF front-end module and RF power amplifier module

Abstract

The present invention provides a radio frequency front-end module, which includes a power amplifier, a single-pole double-throw radio frequency switch, a low-noise amplifier, a first single-pole single-throw radio frequency switch, a coupler, a double-pole double-throw radio frequency switch, a radio frequency amplifier, a second single-pole single-throw radio frequency switch, a detector, and an operational amplifier. When the processing capability of the host computer is weak or the commands between the host computer and the radio frequency front-end module are incompatible, the radio frequency front-end module in the present invention can improve its ability to receive signals and timely realize the switching of the receiving bypass channel and the low-noise amplifier channel, while effectively reducing the complexity of the transmission power control, reducing radiation, reducing energy consumption, and improving the service life of the radio frequency front-end module.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a radio frequency front-end module and a radio frequency power amplifier module. Background Art

[0002] In the time division duplex (TDD) system of wireless communication, a RF front-end module (FEM) is often required. The RF front-end module is mainly composed of RF switches, RF power amplifiers (PA), low noise amplifiers (LNA) and other circuits.

[0003] Among them, the RF switch switches the RF path according to the receive / transmit timing control signal, the RF power amplifier is used to amplify the transmit signal, and the low noise amplifier is used to amplify the weak receive signal. However, in the actual circuit operation, the strength of the received signal varies greatly, and its dynamic range can reach more than 90dB. In order to cope with the reception of strong signals, the receiving path also requires a bypass channel (ByPass). When a strong signal is received, the internal bypass channel of the RF front-end module is opened and the low noise amplifier channel is closed, or the bypass channel is closed and the low noise amplifier channel is opened.

[0004] In the prior art, the switching between the receiving bypass channel and the low-noise amplifier channel is controlled by the host computer, and the RF front-end module only passively executes the host computer commands. In this way, when the processing capability of the host computer is weak, or the commands between the host computer and the RF front-end module are incompatible, the ability of the RF front-end module to receive signals is weakened, and the switching between the receiving bypass channel and the low-noise amplifier channel cannot be realized in time. Summary of the invention

[0005] In view of the above deficiencies in the prior art, the present invention proposes a new RF front-end module and RF power amplifier module to solve the problem in the prior art that when the processing capability of the host computer is weak, or the commands between the host computer and the RF front-end module are incompatible, the ability of the RF front-end module to receive signals is weakened, and the switching between the receiving bypass channel and the low-noise amplifier channel cannot be realized in time.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a radio frequency front-end module, which includes a power amplifier, a single-pole double-throw radio frequency switch, a low-noise amplifier, a first single-pole single-throw radio frequency switch, a coupler, a double-pole double-throw radio frequency switch, a radio frequency amplifier, a second single-pole single-throw radio frequency switch, a detector, and an operational amplifier;

[0008] The first input end of the power amplifier is used to receive a radio frequency signal, and the second input end of the power amplifier is used to receive an external first logic control signal to control the power amplifier to be turned on or off;

[0009] The first connection end of the single-pole double-throw radio frequency switch is connected to the output end of the power amplifier, and the logic control end of the single-pole double-throw radio frequency switch is used to receive an external first logic control signal to control the common end of the single-pole double-throw radio frequency switch to be connected to the first connection end of the single-pole double-throw radio frequency switch or the second connection end of the single-pole double-throw radio frequency switch;

[0010] The first input terminal of the low noise amplifier is connected to the second connection terminal of the single-pole double-throw radio frequency switch, the second input terminal of the low noise amplifier is used to connect to the first working voltage, and the third input terminal of the low noise amplifier is used to receive an enable signal to control the opening or closing of the low noise amplifier;

[0011] A first end of the first single-pole single-throw radio frequency switch is connected to a first input end of the low-noise amplifier, a second end of the first single-pole single-throw radio frequency switch is connected to an output end of the low-noise amplifier, and a logic control end of the first single-pole single-throw radio frequency switch is used to receive an enable signal to control the opening or closing of the first single-pole single-throw radio frequency switch;

[0012] The input end of the coupler is connected to the common end of the single-pole double-throw radio frequency switch, and the output end of the coupler is used to connect to the antenna;

[0013] The first switching end of the double-pole double-throw radio frequency switch and the second switching end of the double-pole double-throw radio frequency switch are respectively connected to the two coupled output ends of the coupler, and the logic control end of the double-pole double-throw radio frequency switch is used to receive an external first logic control signal to control the first switching end of the double-pole double-throw radio frequency switch to be connected to the first connection end of the double-pole double-throw radio frequency switch or the second connection end of the double-pole double-throw radio frequency switch, and control the second switching end of the double-pole double-throw radio frequency switch to be connected to the first connection end of the double-pole double-throw radio frequency switch or the second connection end of the double-pole double-throw radio frequency switch, and the first connection end of the double-pole double-throw radio frequency switch is grounded;

[0014] The first input end of the radio frequency amplifier is connected to the second connection end of the double-pole double-throw radio frequency switch; the second input end of the radio frequency amplifier is used to receive an external second logic control signal to control the opening or closing of the radio frequency amplifier;

[0015] A first end of the second single-pole single-throw RF switch is connected to a first input end of the RF amplifier, a second end of the second single-pole single-throw RF switch is connected to an output end of the RF amplifier, and a signal end of the second single-pole single-throw RF switch is used to receive an external first logic control signal to control the opening or closing of the second single-pole single-throw RF switch;

[0016] The input end of the detector is connected to the output end of the radio frequency amplifier, and the output end of the detector is used to output a DC signal;

[0017] The non-inverting input terminal of the operational amplifier is connected to the output terminal of the detector, the inverting input terminal of the operational amplifier is connected to a reference voltage, the first input terminal of the operational amplifier is connected to a second operating voltage, the ground terminal of the operational amplifier is grounded, the second input terminal of the operational amplifier is used to receive an external second logic control signal to control the opening or closing of the operational amplifier, and the output terminal of the operational amplifier is used to output enable signals to the low-noise amplifier and the first single-pole single-throw radio frequency switch respectively.

[0018] Preferably, the RF front-end module further includes a first resistor, a first end of the first resistor is connected to the second fixed end of the double-pole double-throw RF switch, and a second end of the first resistor is grounded.

[0019] Preferably, the RF front-end module also includes a second resistor, a first end of the second resistor is connected to the in-phase input terminal of the operational amplifier, and a second end of the second resistor is connected to the output terminal of the operational amplifier.

[0020] Preferably, the RF front-end module also includes a third resistor, a first end of the third resistor is connected to the output end of the detector, and a second end of the third resistor is connected to the in-phase input end of the operational amplifier.

[0021] In a second aspect, the present invention provides a radio frequency power amplifier module, which includes the radio frequency power amplifier module as described above.

[0022] Compared with the prior art, the RF front-end module in the present invention is designed to include a power amplifier, a single-pole double-throw RF switch, a low-noise amplifier, a first single-pole single-throw RF switch, a coupler, a double-pole double-throw RF switch, an RF amplifier, a second single-pole single-throw RF switch, a detector and an operational amplifier, and the connection relationship of each device is limited, so that the RF front-end module can improve its ability to receive signals when the processing capability of the host computer is weak or the commands between the host computer and the RF front-end module are incompatible, and timely realize the switching of the receiving bypass channel and the low-noise amplifier channel, while effectively reducing the complexity of transmission power control, reducing radiation, reducing energy consumption, and improving the service life of the RF front-end module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings. The above and other aspects of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings. In the accompanying drawings:

[0024] Figure 1A circuit schematic diagram of a radio frequency front-end module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] The embodiment of the present invention provides a radio frequency front-end module 100, Figure 1 As shown, it includes a power amplifier PA1, a single-pole double-throw RF switch S1, a low noise amplifier LNA1, a first single-pole single-throw RF switch S2, a coupler Coup1, a double-pole double-throw RF switch S4, a RF amplifier Amp1, a second single-pole single-throw RF switch S3, a detector Det1 and an operational amplifier Amp2.

[0030] The first input end of the power amplifier PA1 is used to receive a radio frequency signal (TXin), and the second output end of the power amplifier PA1 is used to receive a first logic control signal (TXEN) transmitted by a host computer to control the power amplifier PA1 to be turned on or off.

[0031] When the power amplifier PA1 is turned on, the power amplifier PA1 amplifies the received radio frequency signal. When the power amplifier PA1 is turned off, the power amplifier PA1 does not amplify the received radio frequency signal.

[0032] The first connection end of the single-pole double-throw RF switch S1 is connected to the output end of the power amplifier PA1, and the logic control end of the single-pole double-throw RF switch S1 is used to receive a first logic control signal transmitted by the host computer to control the common end of the single-pole double-throw RF switch S1 to be connected to the first connection end of the single-pole double-throw RF switch S1 or the second connection end of the single-pole double-throw RF switch S1.

[0033] This is equivalent to the logic control end of the single-pole double-throw RF switch S1 being used to select the path or receiving path of the power amplifier PA1 by receiving the first logic control signal transmitted by the host computer, and the receiving path includes the low-noise amplifier LNA1 and the first single-pole single-throw RF switch S2; when the common end of the single-pole double-throw RF switch S1 is connected to the first connection end of the single-pole double-throw RF switch S1, the path of the power amplifier PA1 is selected, and when the common end of the single-pole double-throw RF switch S1 is connected to the second connection end of the single-pole double-throw RF switch S1, the receiving path is selected.

[0034] A first input terminal of the low noise amplifier LNA1 is connected to a second connection terminal of the single-pole double-throw RF switch S1, a second input terminal of the low noise amplifier LNA1 is used to connect to a first operating voltage (RXLNA VCC), and a third input terminal of the low noise amplifier LNA1 is used to receive an enable signal (RXLNAEN) to control the opening or closing of the low noise amplifier LNA1.

[0035] When the low noise amplifier LNA1 is turned on, the low noise amplifier LNA1 amplifies the signal flowing through it. When the low noise amplifier LNA1 is turned off, the low noise amplifier LNA1 does not amplify the signal flowing through it.

[0036] A first end of the first single-pole single-throw RF switch S2 is connected to a first input end of the low-noise amplifier LNA1, a second end of the first single-pole single-throw RF switch S2 is connected to an output end of the low-noise amplifier LNA1, and a logic control end of the first single-pole single-throw RF switch S2 is used to receive an enable signal to control the opening or closing of the first single-pole single-throw RF switch S2.

[0037] When the first single-pole single-throw radio frequency switch S2 is turned on, the low noise amplifier LNA1 is in a non-use state, and when the first single-pole single-throw radio frequency switch S2 is turned off, the low noise amplifier LNA1 is in a use state.

[0038] The input end of the coupler Coup1 is connected to the common end of the single-pole double-throw RF switch S1, and the output end of the coupler Coup1 is used to connect to the antenna (ANT);

[0039] The first switching end of the double-pole double-throw RF switch S4 and the second switching end of the double-pole double-throw RF switch S4 are respectively connected to the two coupled output ends of the coupler Coup1, and the logic control end of the double-pole double-throw RF switch S4 is used to receive the first logic control signal transmitted by the host computer to control the first switching end of the double-pole double-throw RF switch S4 to be connected to the first connection end of the double-pole double-throw RF switch S4 or the second connection end of the double-pole double-throw RF switch S4, and control the second switching end of the double-pole double-throw RF switch S4 to be connected to the first connection end of the double-pole double-throw RF switch S4 or the second connection end of the double-pole double-throw RF switch S4, and the first connection end of the double-pole double-throw RF switch S4 is grounded.

[0040] When the first switching end of the double-pole double-throw RF switch S4 is connected to the first connection end of the double-pole double-throw RF switch S4, the second switching end of the double-pole double-throw RF switch S4 is connected to the second connection end of the double-pole double-throw RF switch S4. On the contrary, when the first switching end of the double-pole double-throw RF switch S4 is connected to the second connection end of the double-pole double-throw RF switch S4, the second switching end of the double-pole double-throw RF switch S4 is connected to the first connection end of the double-pole double-throw RF switch S4. Of course, the first switching end and the second switching end of the double-pole double-throw RF switch S4 can be interchanged with the first connection end and the second connection end of the double-pole double-throw RF switch S4.

[0041] In addition, the manner in which the first switching end and the second switching end in the double-pole double-throw RF switch S4 are respectively connected to the first connection end and the second connection end can be used to select whether the RF amplifier Amp1 is connected to the coupler Coup1, which is equivalent to being used to control the power detection path, and the power detection path includes the RF amplifier Amp1, the second single-pole single-throw RF switch S3, the detector Det1 and the operational amplifier Amp2.

[0042] The first input terminal of the RF amplifier Amp1 is connected to the second connection terminal of the double-pole double-throw RF switch S4; the second input terminal of the RF amplifier Amp1 is used to receive the second logic control signal (RXEN) transmitted by the host computer to control the opening or closing of the RF amplifier Amp1. The RF amplifier Amp1 can also be called a small signal RF amplifier.

[0043] When the RF amplifier Amp1 is turned on, the RF amplifier Amp1 amplifies the signal flowing through it, and when the RF amplifier Amp1 is turned off, the RF amplifier Amp1 does not amplify the signal flowing through it.

[0044] A first end of the second single-pole single-throw RF switch S3 is connected to a first input end of the RF amplifier Amp1, a second end of the second single-pole single-throw RF switch S3 is connected to an output end of the RF amplifier Amp1, and a signal end of the second single-pole single-throw RF switch S3 is used to receive a first logic control signal transmitted by a host computer to control the opening or closing of the second single-pole single-throw RF switch S3.

[0045] When the second single-pole single-throw RF switch S3 is turned on, the RF amplifier Amp1 is in a non-use state, and when the second single-pole single-throw RF switch S3 is turned off, the RF amplifier Amp1 is in a use state.

[0046] The input end of the detector Det1 is connected to the output end of the RF amplifier Amp1, and the output end of the detector Det1 is used to output a DC signal (Vdet);

[0047] The non-inverting input terminal of the operational amplifier Amp2 is connected to the output terminal of the detector Det1, the inverting input terminal of the operational amplifier Amp2 is connected to the reference voltage (Vref), the first input terminal of the operational amplifier Amp2 is connected to the second operating voltage (VCC), the ground terminal of the operational amplifier Amp2 is grounded, the second input terminal of the operational amplifier Amp2 is used to receive the second logic control signal transmitted by the host computer to control the opening or closing of the operational amplifier Amp2, and the output terminal of the operational amplifier Amp2 is used to output an enable signal to the low noise amplifier LNA1 and the first single-pole single-throw radio frequency switch S2 respectively; the voltage value of the second operating voltage is different from the voltage value of the first operating voltage.

[0048] When the operational amplifier Amp2 is turned on, the operational amplifier Amp2 amplifies the signal flowing through it, and when the operational amplifier Amp2 is turned off, the operational amplifier Amp2 does not amplify the signal flowing through it.

[0049] The first logic control signal and the second logic control signal transmitted by the host computer described above are equivalent to the external first logic control signal and the second logic control signal.

[0050] In this embodiment, the RF front-end module 100 further includes a first resistor R1 , a second resistor R2 , and a third resistor R3 .

[0051] A first end of the first resistor R1 is connected to the second fixed end of the double-pole double-throw RF switch S4, and a second end of the first resistor R1 is grounded; a first end of the second resistor R2 is connected to the in-phase input terminal of the operational amplifier Amp2, and a second end of the second resistor R2 is connected to the output terminal of the operational amplifier Amp2; a first end of the third resistor R3 is connected to the output terminal of the detector Det1, and a second end of the third resistor R3 is connected to the in-phase input terminal of the operational amplifier Amp2.

[0052] The power amplifier PA1 is used to amplify the radio frequency signal; the single-pole double-throw radio frequency switch S1 is used to switch the transmitting path and the receiving path, and the transmitting path is the path of the power amplifier PA1; the coupler Coup1 is used to transmit the amplified radio frequency signal and receive the power detection signal; the low noise amplifier LNA1 is used to amplify the received weak signal; the radio frequency amplifier Amp1 is also called the small signal radio frequency amplifier Amp1; the detector Det1 is used to convert the radio frequency signal into a corresponding DC signal.

[0053] In the following, the first connection end of the single-pole double-throw RF switch S1 is set to S1-1, the second connection end of the single-pole double-throw RF switch S1 is set to S1-2, and the common end of the single-pole double-throw RF switch S1 is set to S1-3; the input end of the coupler Coup1 is set to Coup1-1, the output end of the coupler Coup1 is set to Coup1-2, and the two coupled output ends of the coupler Coup1 are Coup1-3 and Coup1-4 respectively; the first end of the first single-pole single-throw RF switch S2 is set to S2-1, and the second end of the first single-pole single-throw RF switch S2 is set to S2-2; the first switching end and the second switching end of the double-pole double-throw RF switch S4 are set to S4-1 and S4-2 respectively, the first connection end of the double-pole double-throw RF switch S4 is set to S4-3, and the second connection end of the double-pole double-throw RF switch S4 is set to S4-4; the first end of the second single-pole single-throw RF switch S3 is set to S3-1, and the second end of the second single-pole single-throw RF switch S3 is set to S3-2.

[0054] Among them, S1-1, S1-2, S4-3, and S4-4 can also be called fixed ends, and S1-3, S4-1, and S4-2 can also be called movable ends, that is, the movable ends can be switched according to needs to connect to the corresponding fixed ends.

[0055] The transmission path working process of the RF front-end module 100 in this embodiment is as follows: in the transmission time slot (TX Slot), the host computer outputs the logic control signal TXEN to make TXEN high level. TXEN is set to high level only in the transmission time slot and is set to 0V at other times. At the same time, the modulator outputs the RF signal TXIn to the power amplifier PA1. The power amplifier PA1 is turned on under the action of TXEN, amplifies the input TXIn, and outputs it to the S1-1 terminal of the single-pole double-throw RF switch S1.

[0056] The single-pole double-throw RF switch S1 is controlled by TXEN. When TXEN is high, S1-1 and S1-3 are turned on, and S1-2 and S1-3 are turned off. When TXEN is low, S1-1 and S1-3 are turned off, and S1-2 and S1-3 are turned on.

[0057] Therefore, in the transmission time slot, the output signal of the power amplifier PA1 is output from S1-3 to Coup1-1 of the coupler Coup1 through the single-pole double-throw RF switch S1, and then output from Coup1-2 of the coupler Coup1 to the antenna. At the same time, the coupler Coup1 couples part of the transmission signal to the coupling line and transmits it to the double-pole double-throw RF switch S4 through the two coupling ends of the coupler Coup1.

[0058] The double-pole double-throw RF switch S4 is controlled by the TXEN signal. When TXEN is at a high level, S4-1 is connected to S4-3 and S4-2 is connected to S4-4. Otherwise, S4-1 is connected to S4-4 and S4-2 is connected to S4-3.

[0059] Therefore, in the transmission time slot, because TXEN is at a high level, Coup1-3 is connected to the first resistor R1 through the double-pole double-throw RF switch S4, and Coup1-4 outputs a coupled signal through S4-4. The first resistor R1 is a 50-ohm resistor. The coupled output signal is simultaneously transmitted to S3-1 of the second single-pole single-throw RF switch S3 and the input end of the RF amplifier Amp1.

[0060] The second single-pole single-throw RF switch S3 is controlled by TXEN. When TXEN is at a high level, the second single-pole single-throw RF switch S3 is turned on, otherwise the second single-pole single-throw RF switch S3 is turned off.

[0061] RF amplifier Amp1 is controlled by RXEN. When RXEN is high, RF amplifier Amp1 works; otherwise, RF amplifier Amp1 is turned off. RXEN is output by the host computer. In the receiving time slot (RX Slot), RXEN is set to high level, otherwise RXEN is set to 0V.

[0062] Therefore, in the transmission time slot, the second single-pole single-throw RF switch S3 is turned on, the RF amplifier Amp1 is turned off, and the coupled output signal is transmitted to the input end of the detector Det1 through the second single-pole single-throw RF switch S3. The detector Det1 converts the input RF signal into a DC signal Vdet; the voltage amplitude of Vdet is determined by the RF power input to the detector Det1. The greater the input power, the higher the output Vdet voltage.

[0063] The DC signal Vdet is output to the host computer for transmission power detection.

[0064] The working process of the receiving path of the RF front-end module 100 in this embodiment is as follows: the host computer sets TXEN to 0V and RXEN to a high level in the receiving time slot, and the RF signal received by the antenna ANT is transmitted to S1-3 via the coupler Coup1. Since TXEN is 0V at this time, S1-3 is connected to S1-2, and the received signal is transmitted to S2-1 and the input end of the low noise amplifier LNA1 after passing through the single-pole double-throw RF switch S1.

[0065] The first single-pole single-throw RF switch S2 and the low-noise amplifier LNA1 are controlled by RXLNAEN. When RXLNAEN is at a high level, the first single-pole single-throw RF switch S2 conducts and the low-noise amplifier LNA1 is turned off; otherwise, the first single-pole single-throw RF switch S2 is cutoff and the low-noise amplifier LNA1 operates.

[0066] The received signal is simultaneously coupled to S4-1 and S4-2 via the coupler Coup1. The receive time slot TXEN is set to 0V. Coup1-4 of the coupler Coup1 is connected to the first resistor R1 through the double-pole double-throw RF switch S4, and Coup1-3 outputs the coupled signal through S4-4. The transmit coupled output signal is simultaneously transmitted to S3-1 and the input terminal of the RF amplifier Amp1.

[0067] The second single-pole single-throw RF switch S3 and the RF amplifier Amp1 are controlled by TXEN and RXEN. The second single-pole single-throw RF switch S3 is cutoff and the RF amplifier Amp1 is turned on; the received coupled signal is amplified by the RF amplifier Amp1 and then output to the detector Det1, which is converted into a DC signal Vdet.

[0068] The Vdet signal is transmitted through the second single-pole single-throw RF switch S3 to the output terminal of the operational amplifier Amp2, which is designed as a hysteresis comparator; and is controlled by RXEN. When RXEN is set to a high level, the operational amplifier Amp2 operates, otherwise the operational amplifier Amp2 is turned off. The reference voltage Vref is a DC signal of 0.5V or other voltage values, which can be generated by dividing the operating voltage VCC or any other form.

[0069] When Vdet > Vh, the output high level of the operational amplifier is Voh; when Vdet < Vl, the output low level of the operational amplifier Amp2 is Vol. The formula is as follows:

[0070] ;

[0071] ;

[0072] The operational amplifier Amp2 outputs RXLNAEN to control the first single-pole single-throw RF switch S2 and the low-noise amplifier LNA1.

[0073] Compared with the prior art, the RF front-end module 100 in this embodiment is designed to include a power amplifier PA1, a single-pole double-throw RF switch S1, a low-noise amplifier LNA1, a first single-pole single-throw RF switch S2, a coupler Coup1, a double-pole double-throw RF switch S4, an RF amplifier Amp1, a second single-pole single-throw RF switch S3, a detector Det1 and an operational amplifier Amp2, and the connection relationship of each component is limited, so that the RF front-end module 100 can improve its ability to receive signals when the processing capability of the host computer is weak or the commands between the host computer and the RF front-end module 100 are incompatible, and timely realize the switching of the receiving bypass channel and the low-noise amplifier LNA1 channel, while effectively reducing the complexity of transmit power control, reducing radiation, reducing energy consumption, and improving the service life of the RF front-end module 100.

[0074] Embodiment 2

[0075] The embodiment of the present invention provides a radio frequency power amplifier module, which includes the radio frequency front-end module 100 in embodiment 1. Since the radio frequency power amplifier module in this embodiment includes the radio frequency front-end module 100 in embodiment 1, it can also achieve the technical effect achieved by the radio frequency front-end module 100 in embodiment 1, which will not be described in detail here.

[0076] It should be noted that the various embodiments described above with reference to the accompanying drawings are only used to illustrate the present invention rather than to limit the scope of the present invention. Those skilled in the art should understand that any modification or equivalent substitution of the present invention without departing from the spirit and scope of the present invention should be included within the scope of the present invention. In addition, unless otherwise indicated by the context, words appearing in the singular include the plural form, and vice versa. In addition, unless otherwise specified, all or part of any embodiment may be used in combination with all or part of any other embodiment.

Claims

1. A radio frequency front-end module, characterized in that: The RF front-end module includes a power amplifier, a single-pole double-throw RF switch, a low-noise amplifier, a first single-pole single-throw RF switch, a coupler, a double-pole double-throw RF switch, a RF amplifier, a second single-pole single-throw RF switch, a detector and an operational amplifier; The first input end of the power amplifier is used to receive a radio frequency signal, and the second input end of the power amplifier is used to receive an external first logic control signal to control the power amplifier to be turned on or off; The first connection end of the single-pole double-throw radio frequency switch is connected to the output end of the power amplifier, and the logic control end of the single-pole double-throw radio frequency switch is used to receive an external first logic control signal to control the common end of the single-pole double-throw radio frequency switch to be connected to the first connection end of the single-pole double-throw radio frequency switch or the second connection end of the single-pole double-throw radio frequency switch; The first input terminal of the low noise amplifier is connected to the second connection terminal of the single-pole double-throw radio frequency switch, the second input terminal of the low noise amplifier is used to connect to the first working voltage, and the third input terminal of the low noise amplifier is used to receive an enable signal to control the opening or closing of the low noise amplifier; A first end of the first single-pole single-throw radio frequency switch is connected to a first input end of the low-noise amplifier, a second end of the first single-pole single-throw radio frequency switch is connected to an output end of the low-noise amplifier, and a logic control end of the first single-pole single-throw radio frequency switch is used to receive an enable signal to control the opening or closing of the first single-pole single-throw radio frequency switch; The input end of the coupler is connected to the common end of the single-pole double-throw radio frequency switch, and the output end of the coupler is used to connect to the antenna; The first switching end of the double-pole double-throw radio frequency switch and the second switching end of the double-pole double-throw radio frequency switch are respectively connected to the two coupled output ends of the coupler, and the logic control end of the double-pole double-throw radio frequency switch is used to receive an external first logic control signal to control the first switching end of the double-pole double-throw radio frequency switch to be connected to the first connection end of the double-pole double-throw radio frequency switch or the second connection end of the double-pole double-throw radio frequency switch, and control the second switching end of the double-pole double-throw radio frequency switch to be connected to the first connection end of the double-pole double-throw radio frequency switch or the second connection end of the double-pole double-throw radio frequency switch, and the first connection end of the double-pole double-throw radio frequency switch is grounded; The first input end of the radio frequency amplifier is connected to the second connection end of the double-pole double-throw radio frequency switch; the second input end of the radio frequency amplifier is used to receive an external second logic control signal to control the opening or closing of the radio frequency amplifier; A first end of the second single-pole single-throw RF switch is connected to a first input end of the RF amplifier, a second end of the second single-pole single-throw RF switch is connected to an output end of the RF amplifier, and a signal end of the second single-pole single-throw RF switch is used to receive an external first logic control signal to control the opening or closing of the second single-pole single-throw RF switch; The input end of the detector is connected to the output end of the radio frequency amplifier, and the output end of the detector is used to output a DC signal; The non-inverting input terminal of the operational amplifier is connected to the output terminal of the detector, the inverting input terminal of the operational amplifier is connected to a reference voltage, the first input terminal of the operational amplifier is connected to a second operating voltage, the ground terminal of the operational amplifier is grounded, the second input terminal of the operational amplifier is used to receive an external second logic control signal to control the opening or closing of the operational amplifier, and the output terminal of the operational amplifier is used to output enable signals to the low-noise amplifier and the first single-pole single-throw radio frequency switch respectively.

2. The RF front-end module according to claim 1, characterized in that: The RF front-end module also includes a first resistor, a first end of the first resistor is connected to the second fixed end of the double-pole double-throw RF switch, and a second end of the first resistor is grounded.

3. The RF front-end module according to claim 2, characterized in that: The RF front-end module also includes a second resistor, a first end of the second resistor is connected to the in-phase input terminal of the operational amplifier, and a second end of the second resistor is connected to the output terminal of the operational amplifier.

4. The RF front-end module according to claim 3, characterized in that: The RF front-end module also includes a third resistor, a first end of the third resistor is connected to the output end of the detector, and a second end of the third resistor is connected to the non-inverting input end of the operational amplifier.

5. A radio frequency power amplifier module, characterized in that: The RF power amplifier module includes the RF power amplifier module as described in any one of claims 1 to 4.

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