Single-ended amplifier with bias stabilization

Abstract

Aspects of an amplifier with bias stabilization are described. In one example, an amplifier includes an output amplifier stage having an input terminal, a biasing leg having a biasing node coupled to the input terminal, and a bias feedback network coupled between the input terminal of the output amplifier stage and the biasing leg. The bias feedback network can include a difference amplifier, a bypass stage, and a reference voltage generator in one example. The difference amplifier can generate a bias control signal based on a difference between a bias voltage at a base terminal of the output amplifier stage and a voltage reference generated by the reference voltage generator. The bias feedback network generates the bias control signal and controls the bias voltage based on feedback, to keep the bias voltage and bias current constant over process, temperature, gain and other variations for consistent performance.

Dependencies are inferred from the claim text.