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High Track Density PES System With Larger Gain Range

IP.com Disclosure Number: IPCOM000041394D
Original Publication Date: 1984-Jan-01
Included in the Prior Art Database: 2005-Feb-02

Publishing Venue

IBM

Related People

Authors:
Liu, CC [+details]

Abstract

As track densities of magnetic recording systems increase, track widths correspondingly decrease. Also, average head moving time specifications keep decreasing. Thus, the need for a position error signal (PES) system with a larger gain range becomes more acute. As the linear gain range increases, a more accurate and more effective head positioning and accessing servo system is required. However, in prior-art PES systems, the linear gain range is restricted to + 1/2 track-width or a total of one track-width. Disclosed here is a unique magnetic recording system structure such that the linear gain range can be increased 100% to _ 1 track-width or a total of two track-widths. In addition, a higher track density PES system can be realized with a servo head with a wider core width element.