High voltage envelope tracker for optimizing performance of radio frequency power amplifier

Abstract

The invention discloses a high voltage envelope tracker for optimizing performance of a radio frequency power amplifier. The high voltage envelope tracker for optimizing the performance of the radio frequency power amplifier comprises a voltage boosting module, a voltage reducing module and a linear power driving module; the voltage boosting module converts a power voltage VBAT into a direct voltage which is a little larger than the maximum envelope signal according to a single-end envelope signal VAMP, and the direct voltage supplies power to the voltage reducing module and the linear power driving module; the voltage reducing module is matched with the linear power driving module to supply power to the radio frequency power amplifier to achieve undistorted power source envelope; the linear power driving module receives a pair of differential envelope signal inputs including Venvp and Venvn. The power source envelope of the radio frequency power amplifier can be controlled to optimize the efficiency of the radio frequency power amplifier in a wide output power range, the working band width of the radio frequency power amplifier is improved, and the efficiency of the whole radio frequency power amplifier can be improved.

Description

Technical field [0001] The present invention belongs to the field of radio frequency integrated circuit technology, which involves a power package that controls a radio frequency power amplifier to optimize the efficiency of the power amplifier at a wider output power range and improves its working bandwidth to optimize the high performance of RF power amplifier performance.Voltage package tracker. Background technique [0002] RF power amplifier is an indispensable key component in various wireless communication applications. It is used to enlarge the power -to -frequency signal output from the sender output to meet the power requirements of the radio frequency signal required for wireless communication.Because modern portable wireless communication equipment usually uses battery power, the power consumption requirements used in the device are very strict.RF power amplifier is a major power consumption component in wireless transceiver. Therefore, it must be reduced as much as p...

AI Technical Summary

Problems solved by technology

The out-of-phase modulation RF power amplifier takes full advantage of the high-efficiency characteristics of the switching amplifier without sacrificing the linearity index; its disadvantage is that it requires additional calculation and power consumption in the signal decomposition part, and the power combination of the out-of-phase modulated signal device is difficult to design

These problems have also led to out-of-phase modulation RF power amplifiers not being widely used in portable mobile terminals.

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