Low power disk drive spindle motor controller

Details Low power disk drive spindle motor controller Low power disk drive spindle motor controller

1990-07-20

1992-11-03

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 71, G11B 1928, G11B 1900

Patent

active

051610736

ABSTRACT:
A hard disk drive digital storage system provides increased efficiency and reduced losses by using a switching regulator type power supply in which a variable duty cycle, low resistance n-channel field effect transistor is located near the ground side of the motor drive circuit. A voltage booster circuit provides higher switching voltages to the motor power phase control switching transistors.

REFERENCES:
patent: 4786995 (1988-11-01), Stupeck et al.
patent: 4831469 (1989-05-01), Hanson et al.
patent: 4839754 (1989-06-01), Gami et al.
patent: 4843288 (1989-06-01), Volz et al.
"Peripherals", IEEE Spectrum, Feb. 1990, pp. 28-30.

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