Disc apparatus for reading out information from disc recording m

Details Disc apparatus for reading out information from disc recording m Disc apparatus for reading out information from disc recording m

1990-11-27

1992-09-22

Levy, Stuart S.

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 752, 369 771, 369270, 360 69, 360 71, G11B 1722, G11B 3302, G11B 2300, G11B 1518

Patent

active

051503409

ABSTRACT:
A disc apparatus includes a drive mechanism rotatively driving a disc recording medium and having a motor and a chucking mechanism provided on a shaft of the motor, a head reading out information from the disc recording medium, a disc loading detector for outputting a loading detection signal when the disc recording medium has been loaded into the disc apparatus, a chucking control circuit outputting a motor rotation control signal for driving the motor during a chucking operation by the chucking mechanism, a motor drive control circuit driving the motor when at least one of a motor rotation control signal from the chucking control circuit and from an external information processing apparatus controlling the disc apparatus are supplied, an information output circuit supplying information obtained from the head to the external information processing apparatus during the motor is rotated on basis of the motor rotation signal, and an output prohibit circuit prohibiting the supply of information from the information output circuit to the external information processing apparatus while the motor rotation control is being output from the chucking control circuit.

REFERENCES:
patent: 4578787 (1986-03-01), Shimizu et al.
patent: 4641294 (1987-02-01), Yoshimaru
patent: 4660189 (1987-04-01), Tsukamura et al.
patent: 4680744 (1987-07-01), Kanamaru
patent: 4853913 (1989-08-01), Maeda
patent: 4918676 (1990-04-01), Miyasaka
"Updata Floppy Disc Apparatus and Application Know-How Thereof", S. Takahashi, CQ Publications, 1984.

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