Method and apparatus for digital filter control in a partial-res

Details Method and apparatus for digital filter control in a partial-res Method and apparatus for digital filter control in a partial-res

1991-05-21

1993-06-15

Mis, David

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 39, 360 51, G11B 509

Patent

active

052204669

ABSTRACT:
A method and apparatus are provided for controlling a digital filter function included in a data path within gain and timing control loops of a PRML magnetic recording channel. The digital filter function is removed from the data path during an acquisition mode and the digital filter function is restored to the data path during a tracking mode. A predetermined gain and a quantized delay at a synchronization frequency are provided when switching from acquisition mode to tracking mode. A unity gain and a delay of an integer number of sample periods are provided at a synchronization frequency when switching from acquisition mode to tracking mode.

REFERENCES:
patent: 4750058 (1988-06-01), Hirt et al.
patent: 4786890 (1988-11-01), Marcus et al.
patent: 4885757 (1989-12-01), Provence
patent: 4888775 (1989-12-01), Karabed et al.
patent: 4888779 (1989-12-01), Karabed et al.
patent: 4929918 (1990-05-01), Chung et al.
patent: 4945538 (1990-07-01), Patel
patent: 4964107 (1990-10-01), Galbraith et al.
patent: 4970609 (1990-11-01), Cunningham et al.
patent: 5121263 (1992-06-01), Kerwin et al.
patent: 5157354 (1992-10-01), Saiki et al.

Affiliated with

Also associated with

Rating

Method and apparatus for digital filter control in a partial-res does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for digital filter control in a partial-res, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for digital filter control in a partial-res will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1047523