Patent ID: 8521114
Filing Date: 2013-08-27
Classification: H03G

Abstract:
1. An Automatic Gain Control (AGC) circuit comprising: a PIN-diode attenuator having an attenuator input and an attenuator output; a control circuit connected to the attenuator so as to read a signal at the attenuator output, the control circuit being configured to supply a feedback control signal to the attenuator based on an error signal between the signal read at the attenuator output and a reference signal, so as to modulate an attenuation level of the attenuator and maintain a substantially constant power level at the attenuator output, the control circuit comprising at least a resistor and a capacitor which define a time constant of the AGC circuit, the AGC circuit featuring a main pole depending on the time constant and on a voltage of the feedback control signal, wherein the control circuit further comprises: