RECEIVER CIRCUIT AND GAIN CONTROLLING METHOD THEREOF

摘要

There is disclosed a receiver circuit and a method for controlling gain in a receiver circuit. The receiver circuit includes a first amplifying stage, a mixer, a filter and a second amplifying stage. The receiver circuit further includes a first feedback loop coupled to the first amplifying stage and configured to generate a first gain control signal for controlling the first signal gain according to a first amplified signal, wherein the first feedback loop operates to maintain the strength of the first amplified signal at a first threshold. The receiver circuit further includes a threshold controller coupled to the first feedback loop, wherein the threshold controller is configured to generate a first threshold control signal for adjusting the first threshold.

主权项

1. A receiver circuit, comprising:
a first amplifying stage having a first signal gain, the first amplifying stage being configured to receive an input signal and generate a first amplified signal; a mixer for converting the frequency of the first amplified signal; a filter for filtering the converted first amplified signal; a second amplifying stage having a second signal gain, the second amplifying stage being configured to receive the filtered first amplified signal and generate a second amplified signal; a first feedback loop coupled to the first amplifying stage and being configured to generate a first gain control signal for controlling the first signal gain according to the first amplified signal, wherein the first feedback loop operates to maintain the strength of the first amplified signal at a first threshold; and a threshold controller coupled to the first feedback loop, the threshold controller being configured to generate a first threshold control signal for adjusting the first threshold.