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A RF Power Amplifier with Adaptive Compensation

An adaptive compensation, radio frequency power technology, applied in power amplifiers, amplifiers, amplifiers with semiconductor devices/discharge tubes, etc., can solve problems such as weak nonlinear distortion adjustment ability, and achieve high maximum linear power and linear efficiency. , fast response, high power effect

Active Publication Date: 2019-02-12
RDA MICROELECTRONICS SHANGHAICO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adjustment linearity mentioned by the bias circuit is mainly to avoid premature and obvious gain compression, but in fact, the ability to adjust nonlinear distortion is weak

Method used

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  • A RF Power Amplifier with Adaptive Compensation
  • A RF Power Amplifier with Adaptive Compensation
  • A RF Power Amplifier with Adaptive Compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] see image 3 , which is Embodiment 1 of the radio frequency power amplifier provided in this application. The radio frequency power amplifier includes a conversion circuit, a driver stage circuit and a power stage circuit.

[0033] The conversion circuit is used to convert one radio frequency input signal RFin into two in-phase input signals in1 and in2 and send them to the driver circuit. The input signal in1 is a radio frequency signal with a DC bias voltage, which can be obtained by superimposing a certain DC component on the radio frequency input signal RFin after a certain amplitude transformation and / or phase shift. The input signal 2 in2 is also a radio frequency signal, which may or may not have a DC bias voltage, and may be obtained by optionally superimposing a certain DC component after undergoing a certain amplitude transformation and / or phase shift of the radio frequency input signal RFin. The magnitudes of the DC components and the amplitudes of the AC c...

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PUM

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Abstract

The invention discloses a self-adaptively compensated radio-frequency power amplifier. A switching circuit generates two same-phase input signals; in a driving-stage circuit, drains of a PMOSFET 1 and a NMOSFET 1 are connected, and used as the output ends of the driving-stage circuit; simultaneously, a middle signal is output to a power-stage circuit and a feedback circuit; the input signal 1 provides direct-current bias and alternating-current input for the PMOSFET 1; the input signal 2 is superposed with a feedback signal, and provides dynamic bias and alternating-current input for the NMOSFET 1; the feedback circuit removes an alternating-current high-frequency component in the middle signal by filtration; only a direct-current component and an alternating-current low-frequency component are reserved, so that the feedback signal is obtained and sent to the grid of the NMOSFET 1; in the power-stage circuit, the middle signal provides dynamic bias and alternating-current input for a NMOSFET 2, so that the NMOSFET 2 is bias in the type AB and has gain expansion; and the drain of the NMOSFET 2 is used as the output end of the power-stage circuit, and used for externally outputting a radio-frequency output signal. By means of the self-adaptively compensated radio-frequency power amplifier disclosed by the invention, three goals including high linearity, high efficiency and high power of the radio-frequency power amplifier are realized at the same time.

Description

technical field [0001] This application relates to a radio frequency power amplifier. Background technique [0002] RF power amplifier (RF power amplifier) ​​is an electronic amplifier used to convert lower power radio frequency signals to higher power. A typical application of a radio frequency power amplifier is to drive an antenna in a transmitter (transmitter), that is, to amplify a modulated radio frequency signal to a required power value and send it to the antenna for transmission. The design specifications of RF power amplifiers usually include gain, output power, bandwidth, efficiency, linearity, input and output impedance matching, heat generation, etc. [0003] The efficiency of an RF power amplifier refers to its ability to convert the DC power of the power supply into the output power of the RF signal. The power supply that is not converted into the output power of the RF signal becomes heat and dissipates, so the low-efficiency RF power amplifier has a high h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/193H03F1/32H03F1/02H03F3/20
CPCH03F1/0205H03F1/3205H03F3/193H03F3/20
Inventor 孙亚楠江亮张海兵贾斌
Owner RDA MICROELECTRONICS SHANGHAICO LTD