Head IC, read circuit, and media storage device

Details Head IC, read circuit, and media storage device Head IC, read circuit, and media storage device

2007-12-21

2010-12-14

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

C360S067000

Reexamination Certificate

active

07852584

ABSTRACT:
A head IC adjusts an amplitude level of head read signals with regard to scattering in head output characteristics, so as to conform to the input dynamic range of the read channel AGC. An AGC amplifier is provided in a head IC connected to a read channel, and the feedback response speed of the AGC circuit of the head IC is set to be substantially slower than the feedback response speed of the AGC circuit of the read channel. Within the head IC, the amplitude of signals from the head is automatically adjusted, enabling adjustment of the input signal level to the input dynamic range of the AGC amplifier of the read channel. The AGC circuit of the head IC has no effect on the faster AGC operation of the AGC circuit of the read channel.

REFERENCES:
patent: 5539779 (1996-07-01), Nagahori
patent: 5576906 (1996-11-01), Fisher et al.
patent: 5831781 (1998-11-01), Okamura
patent: 5862005 (1999-01-01), Leis et al.
patent: 5955921 (1999-09-01), Ide et al.
patent: 6018554 (2000-01-01), Glover
patent: 6452990 (2002-09-01), Leis et al.
patent: 6618215 (2003-09-01), Fung et al.
patent: 2008/0100944 (2008-05-01), Matsui et al.
patent: 2008/0123212 (2008-05-01), Amemiya
patent: 2009/0141386 (2009-06-01), Miura
patent: 2009/0147408 (2009-06-01), Yamasaki
patent: 53-27011 (1978-03-01), None
patent: 63-237205 (1988-10-01), None
patent: 64-062806 (1989-03-01), None
patent: 05-166198 (1993-07-01), None
patent: 07-0006487 (1995-01-01), None
patent: 08-097349 (1996-04-01), None
patent: 9-139040 (1997-05-01), None
patent: 10-021647 (1998-01-01), None
patent: 10-507027 (1998-07-01), None
patent: 2000-187804 (2000-07-01), None
patent: 2001-093221 (2001-04-01), None
patent: 3926391 (2007-06-01), None
patent: WO 97-16010 (1997-05-01), None

Affiliated with

Also associated with

Rating

Head IC, read circuit, and media storage device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Head IC, read circuit, and media storage device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Head IC, read circuit, and media storage device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4194754