Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2009-03-09
2010-11-23
Sniezek, Andrew L (Department: 2627)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S075000
Reexamination Certificate
active
07839599
ABSTRACT:
A weighted combining scheme exploits information from two servo channels operating in parallel. A timing-based servo module comprises two synchronous servo channels coupled respectively to receive two digital servo signals read from a data tape. Both channels have outputs for an unweighted parameter estimate and for a measure of the channel reliability. A weight computation module provides first and second weight signals using the measures of channel reliability from the servo channels. An offset computation module provides first and second offset terms which are summed with the unweighted parameter estimates. Multiplying nodes receive the unweighted parameter estimates and the weight signals and outputs offset weighted parameter estimates. A summing node receives the offset weighted parameter estimates and outputs a combined offset weighted parameter estimate to a servomechanism.
REFERENCES:
patent: 5311380 (1994-05-01), Murata et al.
patent: 5568327 (1996-10-01), Pahr et al.
patent: 5717538 (1998-02-01), Cheung et al.
patent: 6724561 (2004-04-01), Wyman
patent: 6914744 (2005-07-01), Wang
patent: 6992857 (2006-01-01), Knowles et al.
patent: 7164550 (2007-01-01), Kisaka
patent: 7193812 (2007-03-01), Eaton
patent: 2005/0052778 (2005-03-01), Bui et al.
patent: 2008/0151416 (2008-06-01), Cherubini et al.
Bui Nhan X.
Cherubini Giovanni
Cideciyan Roy D.
Hutchins Robert A.
Jelitto Jens
International Business Machines - Corporation
Shifrin Dan
Sniezek Andrew L
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