ACT-enabled 100 MHz channel equalizer (for magnetic recording application)

ACT-enabled 100 MHz channel equalizer (for magnetic recording application)

An acoustic charge transport (ACT) equalizer with 128 taps and a 180-MHz tap sampling rate is demonstrated with a variety of head responses. The standard programmable transversal filter (PTF) product has been modified for magnetic recording applications by the addition of an instrumentation interfac...

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Bibliographic Details
Published in:IEEE transactions on magnetics Vol. 27; no. 6; pp. 4799 - 4803
Main Authors: Kumar, D.D., Hunsinger, B.J.
Format: Journal Article
Language:English
Published: IEEE 01-11-1991
Subjects:
Application software
Equalizers
Instruments
Laboratories
Magnetic circuits
Magnetic heads
Magnetic recording
Magnetic separation
Sampling methods
Transversal filters
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Description
Summary:An acoustic charge transport (ACT) equalizer with 128 taps and a 180-MHz tap sampling rate is demonstrated with a variety of head responses. The standard programmable transversal filter (PTF) product has been modified for magnetic recording applications by the addition of an instrumentation interface and specialized analog circuitry for low-frequency equalization. The resulting module, when combined with controlling software is known as a filter/equalizer development station (FEDS). A laboratory system employing two such FEDS modules for separate amplitude and zero-crossing equalization in a digital saturated magnetic recording peak detection channel is modeled and demonstrated. Equalizer impacts on system speed, packing density, and error rates are predicted with a channel model.< >
ISSN:0018-9464
1941-0069
DOI:10.1109/20.278951