System for processing signals reproduced from a digital magnetic

Details System for processing signals reproduced from a digital magnetic System for processing signals reproduced from a digital magnetic

1988-08-05

1990-02-27

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

G11B 509

Patent

active

049051024

ABSTRACT:
A distorted signal available at the output of a preamplifier which are derived from a magnetically recorded digital signal is differentiated twice. The second derivative signal obtained by that double differentiation is used to derive one set of pulses corresponding to both positive and negative peaks of the twice differented signal, which are then used to clock a D-flipflop. Another set of pulses is derived from the double differentiated signal responding to peaks of only one polarity thereof and these are applied to the D input of the flipflop. The output of the flipflop is a reconstituted replica of the digital signal that was originally recorded.

REFERENCES:
patent: 3252098 (1966-05-01), Schlaepfer
patent: 3846829 (1974-11-01), Lin
patent: 4495528 (1985-01-01), Sasamura et al.
patent: 4564870 (1986-01-01), Kitamura
patent: 4626933 (1986-12-01), Bucska et al.
patent: 4729045 (1988-03-01), Baugh
"NHK Technical Monograph" No. 31, Mar. 1982, p. 20, FIG. 4.5.

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