A CDMA demodulator is disclosed, which comprises an AGC loop (13 to 20) including a IF signal converter (12) for converting a spread spectrum signal to an IF signal and an AGC amplifier (13) for variable gain amplifying the IF signal with a control voltage. The AGC loop also includes a power level calculating...http://www.google.com/patents/US6853837?utm_source=gb-gplus-sharePatent US6853837 - CDMA receiver and DCMA demodulator with AGC circuit