Signal processing system including adaptive read equalizer with

Details Signal processing system including adaptive read equalizer with Signal processing system including adaptive read equalizer with

1995-04-28

1996-06-25

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Pulse crowding correction

360 46, G11B 509

Patent

active

055306004

ABSTRACT:
A microcontroller managed adaptive control system, including a precompensator and a passive equalizer, is provided to decrease the read error rate of a disk drive. An adaptively controllable programmable precompensator adjusts the timing of data bits being written to a disk recording surface with the timing adjustment being relative to the individual bit timing windows. A novel adaptively controllable programmable equalization circuit is provided to enhance the peak amplitudes of data bits read at high frequencies. A microcontroller is programmed to control the programmable precompensator and equalizer to determine the threshold for and subsequently enable the precompensation of the write data and, independently, the equalization of read data with respect to a given media surface.

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Mee and Daniel, Magnetic Recording Handbook: Technology and Applications, pp. 852-878, McGraw-Hill, 1989 Patent Abstracts of Japan, vol. 8, No. 45, p. 257, Feb. 28, 1984, Abstract of JP-58-199610(A).

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