Gain margin detector for a memory unit utilizing a servo control

Details Gain margin detector for a memory unit utilizing a servo control Gain margin detector for a memory unit utilizing a servo control

1988-06-24

1990-06-26

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

318632, G11B 3300, G05B 106

Patent

active

049376888

ABSTRACT:
A memory unit which interposes a variable gain amplifier between a servo circuit and an actuator and is provided with means for varying the gain of the amplifier and means for detecting existence of reproduction error by an information reproducing head, so that existence of a gain margin of a servo mechanism is detected on the basis of whether or not a reproduction error exists when the gain of the amplifier is varied, thereby prechecking the existence of gain margin of the servo mechanism to adjust the gain margin, when short, by exchanging parts or reassembling them.

REFERENCES:
patent: 4380737 (1983-04-01), Sanders
patent: 4445153 (1984-04-01), Fujimoto et al.
patent: 4563775 (1986-01-01), Yokosuka
patent: 4748393 (1988-05-01), Fincher et al.

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