Implementation of PRML in a rigid disk drive

Author

Coker, J.D. ; Galbraith, R.L. ; Kerwin, G.J. ; Rae, J.W. ; Ziperovich, P.A.

Author_Institution

IBM Storage Syst. Products Div., Rochester, MN, USA

Volume

27

Issue

6

fYear

1991

fDate

11/1/1991 12:00:00 AM

Firstpage

4538

Lastpage

4543

Abstract

Describes the channel architecture, IC technology, and integration solutions used in implementing the IBM 0681 disk drive data channel. A brief description of the 0681 disk drive is given along with a block representation of the data channel. Particular focus is placed on the major channel functions: equalization, data coding and detection, gain and timing recovery, and write circuitry. Both the analog and adaptive digital equalizer sections used in the channel are described. The 0681 channel uses an IBM mixed-mode IC technology to implement all channel functions. This IC process is illustrated, along with the partial-response maximum-likelihood (PRML) chip layout. Attention is also given to the hybrid nature of the PRML channel; many channel functions are implemented using a combination of both analog and digital circuits

Keywords

application specific integrated circuits; encoding; equalisers; hard discs; integrated circuit technology; IBM 0681 disk drive data channel; IC technology; PRML channel; channel architecture; data coding; equalization; equalizer sections; mixed-mode IC; partial-response maximum-likelihood; rigid disk drive; timing recovery; write circuitry; Digital circuits; Disk drives; Equalizers; Failure analysis; Integrated circuit layout; Magnetic heads; Maximum likelihood detection; Testing; Thin film circuits; Timing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.278677

Filename

278677