Amplifier with a universal automatic gain control circuit

Details Amplifier with a universal automatic gain control circuit Amplifier with a universal automatic gain control circuit

2006-02-07

2006-02-07

Lee, Michael H. (Department: 2614)

Television

Receiver circuitry

C725S149000, C455S245100, C455S247100, C375S345000

Reexamination Certificate

active

06995806

ABSTRACT:
An amplifier (125) includes a gain stage (210) for amplifying a signal received by the amplifier (125). The amplifier (125) also includes an AGC circuit (400) that adjusts the amplification of the gain stage (210) and that includes a comparator (440) for determining whether the input signal is one of a digital pilot signal and one of an analog pilot signal. The AGC circuit (400) processes both digital and analog pilot signals and automatically adjusts the processing method depending upon the type of pilot signal.

REFERENCES:
patent: 4371842 (1983-02-01), Lee
patent: 4434439 (1984-02-01), Steckler et al.
patent: 4797735 (1989-01-01), Takai et al.
patent: 5187809 (1993-02-01), Rich et al.
patent: 5293405 (1994-03-01), Gersbach et al.
patent: 5408698 (1995-04-01), Serizawa et al.
patent: 5565932 (1996-10-01), Citta et al.
patent: 6725463 (2004-04-01), Birleson
patent: 0769873 (1997-04-01), None
patent: 57143950 (1982-09-01), None

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