A two-stage inverse class d power amplifier circuit and radio frequency power amplifier

Abstract

A double-stage inverse D-class power amplification circuit and a radio frequency power amplifier, which are applicable to the field of radio frequency communications. The circuit comprises: an input balun, connected to a blocking capacitor; a positive-negative two-path drive-stage F-class amplifier, two input ends thereof being connected to two output ends of the input balun by means of two blocking coupling capacitors respectively; a positive-negative two-path amplification-stage inverse F-class amplifier, two input ends thereof being connected to two output ends of the positive-negative two-path drive-stage F-class amplifier by means of two capacitors respectively; and an output balun, two input ends thereof being connected to two output ends of the positive-negative two-path amplification-stage inverse F-class amplifier by means of two capacitors respectively. By utilizing a push-pull structure where an F class drives an inverse F class, the efficiency, power and gain of a power amplifier are improved by means of a harmonic reshaping technology. Fundamental impedance to third harmonic impedance can be independently controlled, the design difficulty is reduced, the complicated operation of later debugging is reduced, and in addition, the power and the gain are further improved by means of the positive-negative double-path structural design.

Description

technical field [0001] The invention belongs to the field of radio frequency communication, and in particular relates to a two-stage inverse class D power amplifying circuit and a radio frequency power amplifier. Background technique [0002] The rapid development of the wireless communication industry has made people's lives more and more convenient, which has led to the wireless communication system becoming an indispensable part of people. The continuous advancement of communication technology and the continuous strengthening of human environmental protection awareness make energy saving and emission reduction a key content that must be considered in the development of today's communication systems. As the most energy-consuming RF power amplifier in the wireless communication system, more than 85% of the power is consumed in the transceiver equipment, so how to improve the efficiency of the power amplifier has become the core of energy saving and emission reduction; at th...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a two-stage inverse class-D power amplifier circuit, aiming to solve the problems of low power gain, working efficiency and output The problem of low power and cumbersome simulation debugging

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