Method and means for direct-current polarity restoration in magn

Details Method and means for direct-current polarity restoration in magn Method and means for direct-current polarity restoration in magn

1982-04-05

1984-08-21

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

G11B 509

Patent

active

044673744

ABSTRACT:
A method and means is disclosed for restoring the direct-current component of a signal read from a storage medium in the form of isolated analog signals which are simultaneously applied to a differentiator and a binary signal generator. The positive pulses of the analog signals trigger the binary signal generator that produces binary signals which initiate and terminate offset signals provided by an offset signal generator. An offset signal is summed differentially with the differentiated analog signal, providing a reconstructed signal which is applied to a zero-crossing detector which produces an output that is either a logical high or low, and that is capable of being processed by digital techniques. The positive-going transitions in the binary signal are equivalent to level transitions of an originally recorded signal.

REFERENCES:
patent: 4346411 (1982-08-01), Buhler et al.
patent: 4371900 (1983-02-01), Huber

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