A median peak detecting analog signal processor for hard disk drive servo

Author

Nagaraj, Krhishnaswamy ; Lewis, Stephen H. ; Walden, Robert W. ; Offord, Glen E. ; Shariatdoust, Reza S. ; Sabnis, Jyoti A. ; Peruzzi, Robert O. ; Barner, Jeffrey R. ; Plany, Joseph ; Mento, Robert P. ; Rakshani, Vafa A. ; Hull, Richard W.

Author_Institution

AT&T Bell Labs., Murray Hill, NJ, USA

Volume

30

Issue

4

fYear

1995

fDate

4/1/1995 12:00:00 AM

Firstpage

461

Lastpage

470

Abstract

An analog signal processor for hard disk drive servo is described. It performs servo demodulation by means of median peak defection which provides immunity against additive as well as multiplicative noise from the medium, unlike conventional methods. A novel circuit configuration has been employed to implement the median peak detector in an area and power efficient manner. The entire servo processor that includes the demodulator and 10 b A/D and D/A converters has been integrated into a single CMOS integrated circuit

Keywords

CMOS analogue integrated circuits; analogue processing circuits; demodulation; hard discs; peak detectors; position control; servomechanisms; 0.9 micron; 80 mW; A/D converter; ADC; CMOS integrated circuit; D/A converter; DAC; analog signal processor; hard disk drive servo; median peak detector; servo demodulation; servo processor; Additive noise; Circuits; Demodulation; Hard disks; Magnetic heads; Magnetic noise; Magnetic separation; Servomechanisms; Signal detection; Signal processing;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.375967

Filename

375967