Patent ID: 9214968
Filing Date: 2015-12-15
Classification: H03F,H04B

Abstract:
1. An electronic circuit system for amplifying an input signal, comprising: a first circuit comprising a power amplifier, configured to receive a first branch of an input signal, and generate a first amplified signal based on the input signal of the first branch; and a second circuit, configured to receive a second branch of the input signal, generate a cancellation signal based on the input signal of the second branch, and combine the first amplified signal and the cancellation signal to generate a second amplified signal, wherein the second circuit comprises an interference re-construction module, which is configured to model an inverse characteristic of a residual distortion and interference part of the first amplified signal via a predefined re-construction function, and generate an anti-phased interference signal based on the input signal of the second branch and the predefined re-construction function, wherein the cancellation signal is generated from the anti-phased interference signal, and wherein the cancellation signal has an approximately equal amplitude and is about 180 degrees out of phase with the residual distortion and interference part so that at least a portion of the residual distortion and interference part is removed when the first amplified signal is combined with the cancellation signal to generate the second amplified signal.