Patent ID: 9225927
Filing Date: 2015-12-29
Classification: H03G,H04N

Abstract:
1. An automatic gain control circuit comprising a first automatic gain control unit arranged to adjust its gain in steps for operation on an input signal and to generate a control signal in response to an adjustment in the gain, a second automatic gain control unit in cascade with the first automatic gain control unit configured and arranged to adjust its gain in response to the control signal and based upon a feedback signal and a range-limited loop bandwidth, and wherein the first and second automatic gain control units are circuits connected so as to adjust their gains, in response to the control signal, in a synchronized manner by adjusting the loop bandwidth of the second automatic gain control unit, and wherein the first automatic gain control unit is arranged to adjust its gain in steps having a first size, the second automatic gain control unit is arranged to adjust its gain in steps having a second size that is less than the first size, and wherein the second size is adjusted in response to the control signal.