H.D.A. pulse shaping system using a differential delay line with

Details H.D.A. pulse shaping system using a differential delay line with H.D.A. pulse shaping system using a differential delay line with

1992-01-22

1993-09-28

Hajec, Donald T.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Pulse crowding correction

360 46, 360 65, G11B 509, G11B 5035

Patent

active

052490866

ABSTRACT:
A system for slimming pulses which represent the data stored in a hard disk drive assembly. The pulse slimming system comprises a delay line with the pulse applied in one polarity to a central tap. The same pulse is applied in the opposite polarity to taps along the delay line on either side of the central tap. The pulses applied to either side of the central tap are controllably attenuated by amplifiers controlled by a microprocessor. The signal which is present at the output of the delay line is the sum of the original pulse with the attenuated pulses applied to either side of the central tap of the delay line subtracted from the leading and trailing edges of the pulse applied to the central tap.

REFERENCES:
patent: 3252098 (1966-05-01), Schlaepfer
patent: 4264935 (1981-04-01), Lee
patent: 4319288 (1982-03-01), Lee
patent: 4479152 (1984-10-01), Chi
patent: 4786989 (1988-11-01), Okamura et al.
patent: 4973915 (1990-11-01), Batey

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