Method and apparatus for DC offset control

Details Method and apparatus for DC offset control Method and apparatus for DC offset control

2007-11-13

2007-11-13

Trinh, Sonny (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

C455S250100, C455S232100

Reexamination Certificate

active

10833499

ABSTRACT:
An automatic gain control (AGC) circuit has an automatic gain controlled amplifier connected in series with a DC blocking capacitor. A reference DC voltage is selectively applied to an input of the automatic gain controlled amplifier and to an output of the DC blocking capacitor output so as to cause the DC blocking capacitor to store a charge proportional to a DC voltage offset introduced by the controllable gain amplifier. The selectively application of the reference DC voltage is momentarily applied for a duration of less than about 1 microsecond and preferably about 0.4 microseconds. The AGC circuit, including both the amplifier and capacitor, are fabricated as an integrated circuit device.

REFERENCES:
patent: 4441080 (1984-04-01), Saari
patent: 5459679 (1995-10-01), Ziperovich
patent: 6144243 (2000-11-01), Vaisanen
patent: 6356218 (2002-03-01), Brown et al.
patent: 6407630 (2002-06-01), Yao et al.
patent: 6941121 (2005-09-01), Chen
patent: 6975845 (2005-12-01), Vihonen et al.
patent: 2002/0075892 (2002-06-01), Bezooijen et al.
patent: 2005/0250459 (2005-11-01), Tervaluoto et al.
patent: 2005/0258989 (2005-11-01), Li et al.
patent: 2005/0276358 (2005-12-01), Pipilos
patent: 58051612 (1983-03-01), None
patent: 5219410 (1993-08-01), None
patent: 6053789 (1994-02-01), None
patent: 2001077640 (2001-03-01), None
patent: 2004096324 (2004-03-01), None
UK Search Report, GB0309937.1, dated Sep. 15, 2004.

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