Method and system to optimize recording conditions in magnetic r

Details Method and system to optimize recording conditions in magnetic r Method and system to optimize recording conditions in magnetic r

1978-12-06

1981-10-13

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

360 31, G11B 547, G11B 2736

Patent

active

042951682

ABSTRACT:
To optimize recording current flow, either for maximum signal output or for best linearity of a changing input signal with respect to output voltage, and provide for automatic optimization of the recording signal level, a ramp or sawtooth wave generator is connected to a recording head, the recorded signal is immediately read and differentiated and the differentiated signal is level detected, for example for zero level for maximum output voltage or for a predetermined level before substantial change of the differentiated signal has resulted, thus providing for optimum linearity, the optimum signal level--as desired--being stored in a memory and used to control the excitation current for subsequent excitation of the transducer heads by a data source.

REFERENCES:
patent: 2791640 (1957-05-01), Wolfe
patent: 3564160 (1971-02-01), Temes
patent: 4011585 (1977-03-01), Sunaga

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