Digital servo demodulation in a digital read channel

Author

Reed, David E. ; Bliss, William G. ; Du, Li ; Karsanbhai, Manhar

Author_Institution

Cirrus Logic, Broomfield, CO., USA

Volume

34

Issue

1

fYear

1998

fDate

1/1/1998 12:00:00 AM

Firstpage

13

Lastpage

16

Abstract

A technique is described which implements high-performance servo burst amplitude demodulation using the 6-bit analog-to-digital converter in a digital read channel. The use of digital circuits reduces the size of the channel chip as well as reducing the design time and variability compared to analog circuits. The performance of the digital area detect burst demodulator is compared to standard analog techniques. Simulation results show digital area detect performance better than peak detect and very close to optimal for a practical burst waveform

Keywords

analogue-digital conversion; demodulation; digital magnetic recording; servomechanisms; 6 bit; analog-to-digital converter; burst amplitude demodulation; digital area detect; digital circuit; digital read channel; digital servo demodulation; simulation; Amplitude estimation; Analog circuits; Circuit simulation; Demodulation; Gas detectors; Gaussian noise; Maximum likelihood estimation; Servomechanisms; Signal processing; Space vector pulse width modulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.663428

Filename

663428