Patent ID: 8446994
Filing Date: 2013-05-21
Classification: H03G,H04B

Abstract:
1. An apparatus for gain control in a receiver, comprising: at least one frequency down-converter that receives at least one receiver channel signal and produces one or more baseband signal DC offset voltages in at least one baseband signal; a level detector that performs the following: a first AGC amplifier that receives said first AGC signal and amplifies the at least one baseband signal according to the first AGC signal; a second AGC amplifier that receives said second AGC signal and amplifies the at least one receiver channel signal according to the second AGC signal; the first and second AGC amplifiers that amplify the at least one baseband signal and the at least one receiver channel signal using the first and second AGC signals configured to reduce the one or more baseband signal DC offset voltages; and a multiplier that receives the first automatic gain control (AGC) signal and outputs the second AGC signal, wherein said multiplier includes an operational amplifier, a first resistor and a second resistor arranged in a non-inverting amplifier configuration.