Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1989-06-28
1991-10-22
Heinz, A. J.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360 65, G11B 509, G11B 5035
Patent
active
050600885
ABSTRACT:
The channel characteristics of magnetic-disk storage devices vary with track radius. An adaptive three-tap transversal equalizer that compensates these variations for systems using partial-response signaling is presented. The equalizer coefficients are updated by applying a procedure that is related to the recursive least-squares algorithm. This new updating procedure does not require multiplications and is well suited for high-speed implementation. Results obtained by computer simulations and measurements with a prototype have shown that the proposed adaptive equalizer can effectively compensate variations in magnetic-disk channel characteristics with track radius.
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Dolivo Francois B.
Oelcer Sedat
Rungeler Andreas
Schott Wolfgang H.
Heinz A. J.
International Business Machines - Corporation
Otto, Jr. Henry E.
Sheladia Varsha V.
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