Recovering servo information from a synchronous servo channel

Details Recovering servo information from a synchronous servo channel Recovering servo information from a synchronous servo channel

2011-03-08

2011-03-08

Olson, Jason C (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

C360S075000

Reexamination Certificate

active

07903360

ABSTRACT:
Provided are a method, servo channel, and tape drive for recovering servo information from a synchronous servo channel. An interpolator reads samples of a servo signal obtained from a servo reader at a rate of one servo sample per clock interval, to produce up to M interpolated servo samples per clock interval. A first buffer buffers interpolation time instants at which the interpolator generates interpolated servo samples. The interpolated servo samples are buffered in a second buffer and the interpolated servo samples are outputted from the second buffer to a correlator to produce correlation signal samples.

REFERENCES:
patent: 7365929 (2008-04-01), Cherubini et al.
patent: 7433142 (2008-10-01), Bui et al.
patent: 2003/0053245 (2003-03-01), Ozdemir
patent: 2008/0151416 (2008-06-01), Cherubini et al.
US Patent Application entitled “Servo Channel For Tape Drive Systems”, U.S. Appl. No. 11/969,184, filed Jan. 3, 2008, by inventors G. Cherubini, R.D. Cideciyan, E.S. Eleftheriou, R.A. Hutchins and J. Jelitto.
R.C. Barrett, et al., “Timing-Based Track-Following Servo for Linear Tape Systems”, IEEE, 1998, pp. 1872-1877.

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