Television – Receiver circuitry
Reexamination Certificate
2004-07-08
2009-10-13
Lee, M. (Department: 2622)
Television
Receiver circuitry
C348S726000, C455S247100
Reexamination Certificate
active
07602448
ABSTRACT:
An apparatus (20) such as a television signal receiver provides an AGC function by using multiple feedback sources which provide both narrow band and wide band AGC signals in an adaptive manner. According to an exemplary embodiment, the apparatus (20) includes a tuner (10, 15, 20, 25, 30) operative to generate first and second IF signals. A first demodulator (40) is operative to generate a first AGC signal responsive to the first IF signal. A second demodulator (50) is operative to generate a second AGC signal responsive to the second IF signal. A wide band AGC detector (60) is operative to generate a third AGC signal responsive to at least one of the first and second IF signals. A switch (70) is operative to selectively provide one of the first, second and third AGC signals to the tuner (10, 15, 20, 25, 30) responsive to a predetermined condition.
REFERENCES:
patent: 5339454 (1994-08-01), Kuo et al.
patent: 6061096 (2000-05-01), Limberg
patent: 6353463 (2002-03-01), Seo
patent: 6512554 (2003-01-01), Ogasawara
patent: 7158192 (2007-01-01), Kunishima
patent: 0 944 255 (1999-09-01), None
patent: 1 383 318 (2004-01-01), None
Search Report dated Sep. 30, 2004.
Ecoff Clint Alan
Grubbs Gary Dean
Hutchinson Daniel Mark
Mayer Matthew Thomas
Cromarty Brian J.
Lee M.
Opalach Joseph J.
Shedd Robert D.
Thomson Licensing
LandOfFree
Apparatus and method for providing an AGC function using... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for providing an AGC function using..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for providing an AGC function using... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4131847