Information processing apparatus for processing reproduction sig

Details Information processing apparatus for processing reproduction sig Information processing apparatus for processing reproduction sig

1992-12-04

1995-05-23

Hajec, Donald

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360113, G11B 5035, G11B 5127

Patent

active

054186609

ABSTRACT:
A nonlinear compensation A/D converting method and a circuit for compensating asymmetry of a reproduction signal waveform, so as not to deteriorate the performance of a discriminator even if there is a nonlinearity such that the amplitudes of the signal differ in dependence on the polarities of the waveforms like a reproduction waveform of an MR head are provided. Scales 1+ and 1- of an A/D converter are set to values which differ in dependence on the positive and negative polarities of the input signal, so that a nonlinear compensation which is suitable for a high accurate and high speed operation can be realized. Even an MR head in which the asymmetry between the upper and lower waveforms of the reproduction waveform is large can be used. A yield of the head can be improved.

REFERENCES:
patent: 3691543 (1972-09-01), Mueller
patent: 3959820 (1976-05-01), Braun
patent: 4236222 (1980-11-01), Loshbough et al.
patent: 4789838 (1988-12-01), Cheng
patent: 4908722 (1990-03-01), Sonobe
patent: 5166806 (1992-11-01), Ebisawa et al.
patent: 5220466 (1993-06-01), Coker et al.
patent: 5272481 (1993-12-01), Sauer

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