A variable gain amplifier includes multiple unit variable gain amplifiers connected in series which amplify an input signal in accordance with their respective gains and generate a multi-stage amplified signal. A gain control circuit generates voltage control signals, one for each of the unit amplifiers,...http://www.google.fr/patents/US6333675?utm_source=gb-gplus-shareBrevet US6333675 - Variable gain amplifier with gain control voltage branch circuit
Variable gain amplifier with gain control voltage branch circuit
