Hard disk drive including moving means for moving a recording/re

Dynamic magnetic information storage or retrieval – General recording or reproducing

Patent

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Details

333172, 358336, 358342, G11B 500

Patent

active

054502527

ABSTRACT:
A hard disk drive includes a head for recording/reproducing data on a recording medium, a motor for moving the head on the recording medium, a motor driver for supplying a driving current to the motor, a data processing circuit for processing data reproduced from the head or record data given to the head, and a cable which has a current line connecting between the motor driver and the motor and a data line connecting between the data processing circuit and the head. The motor has been connected with a noise canceler comprising series-connected first and second filters in parallel with the motor. The connecting point of the first and the second filters of the noise canceler is grounded. A noise generated from the motor driver flows to a ground via the connecting point of the first and the second filters and is cancelled.

REFERENCES:
patent: 4079423 (1978-03-01), Diehl
patent: 4254436 (1981-03-01), Harford
patent: 4342059 (1982-07-01), Wray
patent: 4403346 (1983-09-01), Ogawa
patent: 4460929 (1984-07-01), Bader
patent: 4677487 (1987-06-01), Tomita et al.
patent: 4896220 (1990-01-01), Sato
patent: 5138663 (1992-08-01), Moseley
patent: 5257109 (1993-10-01), Minakawa

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