Pulse or digital communications – Receivers – Automatic gain control
Reexamination Certificate
2007-10-23
2007-10-23
Corrielus, Jean B. (Department: 2611)
Pulse or digital communications
Receivers
Automatic gain control
C455S234100
Reexamination Certificate
active
10630811
ABSTRACT:
To perform gain adjustment of the amplitude of a binary phase shift keying (BPSK) wobble signal from a DVD to enable high-precision demodulation of address information, a peak detection circuit detects a peak value in a time period equal to or more than a half period of the input wobble signal. A gain computation circuit computes a gain adjustment coefficient from the peak value. The gain adjustment coefficient is limited to within a fixed range by a limiter and then supplied to a multiplier. To adjust digital-related delay generated when the gain adjustment coefficient is computed, the input wobble signal is delayed by a delay circuit before being supplied to the multiplier. The multiplier multiplies the wobble signal from the delay circuit by the gain adjustment coefficient and outputs the result as the digital AGC output.
REFERENCES:
patent: 5620466 (1997-04-01), Haefner et al.
patent: 5719867 (1998-02-01), Borazjani
patent: 5940451 (1999-08-01), Kim
patent: 6029056 (2000-02-01), Kiyanagi et al.
patent: 7046800 (2006-05-01), Tenca et al.
patent: 2003/0058764 (2003-03-01), Ueno
patent: 60-20611 (1985-02-01), None
patent: 63-026008 (1988-02-01), None
patent: 01-146413 (1989-06-01), None
patent: 01-200709 (1989-08-01), None
patent: 06-334459 (1994-12-01), None
patent: 8-335957 (1996-12-01), None
patent: 10-302398 (1998-11-01), None
patent: 2001-126413 (2001-05-01), None
Corrielus Jean B.
Matsushita Electric - Industrial Co., Ltd.
McDermott Will & Emery LLP
LandOfFree
Digital AGC circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital AGC circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital AGC circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3877213