A low-voltage IF amplifier (112) provides automatic gain control (AGC) of a source amplifier (104) supplying an IF input signal to the IF amplifier (112). The IF amplifier (112) includes cascaded amplifier stages (202) that include an amplifier element (344) having an input (122) for receiving a stage...http://www.google.com.au/patents/US5481226?utm_source=gb-gplus-sharePatent US5481226 - Low-voltage intermediate frequency amplifier providing automatic gain control of a source amplifier
