NDLI: Design considerations for high data-rate pre-amplifiers for use in a disk-drive

Content Provider	IEEE Xplore Digital Library
Author	Leighton, J.D. Doherty, S. Elliott, C.
Copyright Year	1965
Abstract	In an effort to achieve higher data-rates in disk-drives, it has been proposed that moving the preamp closer to the head will improve writer performance. This paper shows that the opposite is true: moving the writer closer to the head degrades write current rise-time and overshoot. Although settling time is improved by moving the preamp closer to the head, impedance-matching techniques are sufficient to address this. Ironically, reader considerations may motivate Chip-On-Suspension (COS), but only for MR sensors that are either very high or very low impedance. This paper will detail the noise peaking that results from an impedance-mismatched reader input network. Both reader and writer performances can be improved by using novel architectures and by optimizing their respective interconnects.
Sponsorship	IEEE Magnetics Society
Starting Page	627
Ending Page	632
Page Count	6
File Size	180745
File Format	PDF
ISSN	00189464
Volume Number	37
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Steady-state Magnetic heads Impedance Voltage Degradation Transient response Assembly Design optimization Magnetic analysis Equations
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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