Accumulator for non-return to zero (NRZ) linear feedback...

Details Accumulator for non-return to zero (NRZ) linear feedback... Accumulator for non-return to zero (NRZ) linear feedback...

2008-02-14

2010-10-12

Tzeng, Fred (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

Reexamination Certificate

active

07813067

ABSTRACT:
A disk controller for a hard disk drive includes a disk formatter interfaced via an NRZ bus to a read channel for the disk. The disk formatter includes an LFSR accumulator coupled to the NRZ bus, as well as an LSFR generator that generates synthetic test data for the disk formatter. Under control of a test flag which signifies a test mode, the LSFR generator generates synthetic test data, which is used by the disk formatter to drive the NRZ bus. The LSFR accumulator accumulates data on the NRZ bus, together with data on servo information and sector information. An interface is provided through which the accumulated information is provided to test equipment, for offline analysis of the accumulated information, so as to confirm proper operation of the disk subsystem and/or to detect failures therein.

REFERENCES:
patent: 5631913 (1997-05-01), Maeda
patent: 6128755 (2000-10-01), Bello et al.
patent: 6978370 (2005-12-01), Kocher
patent: 7477466 (2009-01-01), Yoshida et al.
patent: 2003/0067699 (2003-04-01), Thomson et al.
patent: 2004/0125868 (2004-07-01), Keller et al.
patent: 2007/0047120 (2007-03-01), DeGroat
patent: 2007/0168814 (2007-07-01), Leininger et al.
patent: 2007/0192656 (2007-08-01), Goessel et al.
patent: 2008/0151618 (2008-06-01), Sharon et al.
patent: 2008/0215798 (2008-09-01), Sharon et al.

Affiliated with

Also associated with

Rating

Accumulator for non-return to zero (NRZ) linear feedback... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Accumulator for non-return to zero (NRZ) linear feedback..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Accumulator for non-return to zero (NRZ) linear feedback... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4154141