Signaling system with low-power automatic gain control

摘要

An integrated circuit receiver includes a first channel comprising an amplifier responsive to a first gain control value in a first mode to receive an input signal and generate a first amplified signal having a transition rate. Detection circuitry in the first channel detects transitions in the first amplified signal in accordance with a detected transition rate. The detected transition rate is based on the first gain control value. Gain control logic adjusts the first gain control value based on a desired detected transition rate. The gain control logic generates a second gain control value for use during a second mode. The second gain control value being based on the first gain control value.