Pulse or digital communications – Equalizers
Reexamination Certificate
2008-05-20
2008-05-20
Ahn, Sam K. (Department: 2611)
Pulse or digital communications
Equalizers
Reexamination Certificate
active
07376179
ABSTRACT:
Methods and circuits utilizing a two stage adaptation algorithm to determine the optimal code for an equalizer to compensate a received signal is disclosed. In the first stage, a coarse tuning algorithm is used to choose a range of codes based on the amplitude of the received signal. The chosen codes will be used as reference points in the second stage. In the second stage, a fine tuning algorithm is used to select a code in the range of reference codes determined in stage one. The fine tuning algorithm looks to the status of the data lock signal generated by the clock recovery circuit. If the data lock signal does not indicate a lock, the fine tuning algorithm cycles through the range of reference codes. If the data lock signal indicates a lock, then that particular code is continued to be used for the equalizer.
REFERENCES:
patent: 4327412 (1982-04-01), Timmons
patent: 5237588 (1993-08-01), Tanaka et al.
patent: 5245561 (1993-09-01), Sugiyama
patent: 5274512 (1993-12-01), Tanaka et al.
patent: 5307375 (1994-04-01), Wu et al.
patent: 5481564 (1996-01-01), Kakuishi et al.
patent: 5483552 (1996-01-01), Shimazaki et al.
patent: 5517213 (1996-05-01), Bhatt et al.
patent: 5590154 (1996-12-01), Forni et al.
patent: 5636244 (1997-06-01), Goodson et al.
patent: 5650954 (1997-07-01), Minuhin
patent: 6003051 (1999-12-01), Okazaki
patent: 6115418 (2000-09-01), Raghavan
patent: 6144697 (2000-11-01), Gelfand et al.
patent: 6192071 (2001-02-01), Hirth et al.
patent: 6370190 (2002-04-01), Young et al.
patent: 6389062 (2002-05-01), Wu
Chen Xi
Lenguyen Bao
Wu Wen-Chung (Stewart)
Ahn Sam K.
Broadcom Corporation
Squire Sanders & Dempsey L.L.P.
LandOfFree
Methods and circuits for optimal equalization does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and circuits for optimal equalization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and circuits for optimal equalization will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2803442