Data detection circuit having a pulse shape and amplitude measur

Details Data detection circuit having a pulse shape and amplitude measur Data detection circuit having a pulse shape and amplitude measur

1991-04-25

1993-06-29

Mis, David

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 39, G11B 509, G11B 2719

Patent

active

052239896

ABSTRACT:
The data detection circuit includes a sampling detector which measures both the shape and amplitude of the incoming pulse signal. This apparatus determines the amplitude of the read signal at a plurality of points in time and produces a signal indicative of the presence of recorded data if the measured amplitudes match predetermined thresholds. The predetermined thresholds are used in three measurements: determination that the amplitude of the read signal at one point in time exceeds a predetermined threshold; a determination that the amplitude of the read signal at the one point in time concurrently exceeds the amplitude of the read signal at two other points in time both before and after the one point in time. Also included in this apparatus is a clock generation circuit that produces a clock signal based upon the indication of the presence of recorded data so that the indication of the recorded data and the generation of the clock signal occur in a single channel.

REFERENCES:
patent: 4297737 (1981-10-01), Andresen et al.
patent: 4581567 (1986-04-01), Yanagawa et al.
patent: 4590526 (1986-05-01), Laatt et al.
patent: 4596981 (1986-06-01), Ueno et al.
patent: 5166838 (1992-11-01), Fuji et al.

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