RF power amplifier with linearity control

摘要

A linear amplifier circuit includes a multi-stage power amplifier that can amplify an input signal to produce an output signal, and a gain feedback control circuit coupled with the output and the input of the multi-stage power amplifier. An adjacent-channel leakage feedback control circuit can detect the output signal at the output of the multi-stage power amplifier and reduce adjacent-channel leakage in the output signal over an output power range based on the detected output signal.

主权项

1. A single chip amplifier circuit comprising:
a single chip consisting of:
a multi-stage power amplifier configured to amplify an input signal to produce an output signal;a sensing circuit configured to detect adjacent-channel leakage (ACL) of the output signal and to produce a sensing signal; anda linearity control circuit configured to control the multi-stage power amplifier to reduce ACL in the output signal in response to the sensing signal.