Data-reproducing device that detects equalization in the presenc

Details Data-reproducing device that detects equalization in the presenc Data-reproducing device that detects equalization in the presenc

1998-03-05

2000-08-01

De Cady, Albert

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

714792, 714794, 714796, G11B 700

Patent

active

060981938

ABSTRACT:
A data-reproducing device is provided that, even when pre-equalization characteristics are varied, conducts an equalization detection operation. The device comprises a subtraction absolute value circuit for calculating a subtraction absolute value, a comparison and selection circuit that outputs a selection signal to show which path is selected, a circuit that stores an estimate of the pre-equalized data, an address generating circuit that provides estimate data needed by the subtraction absolute value circuit as determined by the selection signal, a path memory circuit for storing the selection signal output and outputting the most probable data, and a correction control circuit for renewing the estimate data of the estimate data storing circuit.

REFERENCES:
patent: 5508993 (1996-04-01), Hayashi et al.
patent: 5809079 (1998-09-01), Hayashi
patent: 5958002 (1999-09-01), Zhou et al.

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