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Alan J. Armstrong

Cirrus Logic

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Featured researches published by Alan J. Armstrong.

asilomar conference on signals, systems and computers | 1992

An advanced read/write channel for magnetic disk storage

Richard T. Behrens; Alan J. Armstrong

An advanced read channel for magnetic disk recording is proposed. The channel incorporates a (1,7) run-length limited code with partial response equalization and Viterbi detection. The (1,7) code reduces the severe nonlinear effects that plague thin film disk recording at high densities. It is shown through analysis and simulation that the proposed read channel is suitable for user densities of 1.5 to 2.0 and higher, for reasonable SNR and error rates.<<ETX>>

Archive | 1995

On-the-fly error correction using thermal asperity erasure pointers from a sampled amplitude read channel in a magnetic disk drive

Alan J. Armstrong; Christopher P. Zook

Archive | 1996

Thermal asperity compensation using multiple sync marks for retroactive and split segment data synchronization in a magnetic disk storage system

Christopher P. Zook; Neal Glover; Alan J. Armstrong

Archive | 1997

Channel quality circuit employing a test pattern generator in a sampled amplitude read channel for calibration

William R. Foland; Richard T. Behrens; Alan J. Armstrong; Neal Glover

Archive | 1994

Synchronous read channel employing discrete timing recovery, transition detector, and sequence detector

Richard T. Behrens; Kent D. Anderson; Alan J. Armstrong; Trent Dudley; Bill R. Foland; Neal Glover; Larry D. King

Archive | 1994

Filtering a read signal to attenuate secondary pulses caused by pole tips of a thin film magnetic read head

Richard T. Behrens; Neal Glover; Trent Dudley; Alan J. Armstrong; Christopher P. Zook; William G. Bliss

Archive | 1996

Method and apparatus for calibrating a synchronous read channel integrated circuit

Alan J. Armstrong; Renee E. Wallerius; Richard T. Behrens; Charles J. Duey

Archive | 1997

Synchronous read channel employing a digital center frequency setting for a variable frequency oscillator in discrete time timing recovery

Richard T. Behrens; Kent D. Anderson; Alan J. Armstrong; Trent Dudley; Bill R. Foland; Neal Glover; Larry D. King

Archive | 1997

Synchronous read channel integrated circuit employing a channel quality circuit for calibration

Richard T. Behrens; Kent D. Anderson; Alan J. Armstrong; Trent Dudley; Bill R. Foland; Neal Glover; Larry D. King

Archive | 1997

Synchronous read channel employing a sequence detector with programmable detector levels

Richard T. Behrens; Kent D. Anderson; Alan J. Armstrong; Trent Dudley; Bill R. Foland; Neal Glover; Larry D. King

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Richard T. Behrens

Cirrus Logic

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Neal Glover

Cirrus Logic

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Trent Dudley

Cirrus Logic

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Christopher P. Zook

Cirrus Logic

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Larry D. King

Cirrus Logic

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Bill R. Foland

Cirrus Logic

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Kent D. Anderson

Cirrus Logic

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William G. Bliss

Cirrus Logic

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Charles J. Duey

Cirrus Logic

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Renee E. Wallerius

Cirrus Logic

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