Record medium control apparatus

Details Record medium control apparatus Record medium control apparatus

1988-10-17

1990-09-04

Faber, Alan

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7703, 318632, G11B 3300, G05B 106

Patent

active

049549081

ABSTRACT:
A storage apparatus wherein a servo mechanism of a heed for record and regeneration is provided with a gain-variable amplifier, a gain controller for varying the gain of the gain-variable amplifier, and a comparator for comparing an output of a position sensor and a reference voltage, and which detects a gain margin of the servo mechanism according to the result of the comparison and operates so as to prevent the servo mechanism from an oscillation according to the result of the detection.

REFERENCES:
patent: 4380737 (1983-04-01), Sanders
patent: 4563775 (1986-01-01), Yokosuka
patent: 4748393 (1988-05-01), Fincher et al.
Basics and application of automatic control by Takai and Hasegawa, pp. 245-250, 5/25/1971.
U.S. Patent application No. (Co-pending) 07/211206, filed 6/24/88 by Masaharu Sengoku.

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