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Method of Optimizing Multitrack, Magnetic Write Head

IP.com Disclosure Number: IPCOM000035238D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28

Publishing Venue

IBM

Related People

Authors:
Kahwaty, VN Nix, JL [+details]

Abstract

Dynamic range differs greatly across the tracks of a multitrack, magnetic write head, particularly increasing at write current beyond the write saturation point. The differences are compounded by variations among heads as manufactured, variations among magnetic tapes as manufactured, and shifts in the write characteristics of the heads and tapes caused by wear. Ideally, each track of a head should have the same dynamic range to simplify signal detection. A typical approach to the problem of variance in dynamic range has been the use of read equalization, and less than optimum dynamic range. Unfortunately, read equalization is also known to have the undesirable side effect of reducing signal to noise ratio (SNR).