Method and apparatus for eliminating noises with a read operatio

Details Method and apparatus for eliminating noises with a read operatio Method and apparatus for eliminating noises with a read operatio

1994-10-26

1996-10-15

Beausoliel, Jr., Robert W.

Dynamic magnetic information storage or retrieval

Head

Core

360 55, G11B 502, G06F 1134

Patent

active

055662960

ABSTRACT:
A processor of a drive unit positions a head to a designated cylinder position of a disk medium on the basis of a command notified from an upper controller through a data bus and amplifies a read signal by a read amplifier and, after that, transmits the amplified read signal to the upper controller through a read signal line. A data disconnecting circuit is provided for the data bus from an upper apparatus to the processor. The data disconnecting circuit switches the data bus to a disconnection state by a control signal which is generated from the upper apparatus during the data reading operation. When the control signal is interrupted by the end of the data reading operation, the data bus is returned to the connection state.

REFERENCES:
patent: 3705272 (1972-12-01), Tsuji et al.
patent: 4241420 (1980-12-01), Fish et al.
patent: 5051972 (1991-09-01), Yamamuro
patent: 5088023 (1992-02-01), Nakamura et al.
patent: 5276839 (1994-01-01), Robb et al.
patent: 5444579 (1995-08-01), Klein et al.

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