Power envelope tracing power supply of multi-phase interleaving radio-frequency power amplifier

Abstract

The invention relates to a power envelope tracing power supply of a multi-phase interleaving radio-frequency power amplifier, which comprises an envelope detection circuit for detecting a radio-frequency signal, a linear amplification circuit for amplifying an envelope signal, a multi-phase interleaving synchronous BUCK circuit for controlling a current which is supplied by the linear amplification circuit to the radio-frequency power amplifier, and a switch conversion control circuit for driving and controlling the interleaving synchronous BUCK circuit according to the current outputted by the linear amplification circuit, wherein the envelope detection circuit inputs an inputted radio-frequency signal to the linear amplification circuit to be linear amplified after detecting the radio-frequency signal, the switch conversion control circuit produces a multi-phase drive pulse to control the multi-phase interleaving synchronous BUCK circuit according to the current outputted by the linear amplification circuit, so the current which is supplied by the linear amplification circuit to the radio-frequency power amplifier is minimized.

Description

technical field [0001] The invention relates to a radio frequency power amplifier power supply, in particular to a multi-phase interleaved parallel radio frequency power amplifier power envelope tracking power supply. Background technique [0002] High linearity and high efficiency RF power amplifier (Radio Frequency Power Amplifier, referred to as "RFPA") is not only the fourth generation mobile communication system (4G) and high-definition television (High Definition Television, referred to as Orthogonal Frequency Division Modulation (orthogonal frequency division multiplexing, referred to as "OFDM") used in the "HDTV") system represented by Multi-Carrier Modulation (Multi-Carrier Modulation, referred to as "OFDM") "MCM") is one of the key basic devices, and it is also the goal that the RF power amplification technology at home and abroad has been striving for in the past 20 years. MCM requires a higher carrier frequency and a wider frequency band, and it also requires hi...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to construct a multi-phase interleaved parallel radio frequency power amplifier power envelope tracking power supply to overcome the technical problem of low operating efficiency of radio frequency power amplifiers in the prior art

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