Servo control system for driving a voice coil motor with pulse w

Details Servo control system for driving a voice coil motor with pulse w Servo control system for driving a voice coil motor with pulse w

1996-12-19

1998-07-14

Hindi, Nabil

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7804, G11B 5596

Patent

active

057813620

ABSTRACT:
Disclosed is a drive control circuit for driving a VCM, wherein the voice coil motor is driven by the current corresponding to the level of a PWM signal and a current gain selected by a switching operation according to the servo control modes. The switching operation is performed after a delay for the duration between the starting point of the pulses of the PWM signal and the time of the overshooting of the VCM being minimized.

REFERENCES:
patent: 4575776 (1986-03-01), Stephens et al.
patent: 4727530 (1988-02-01), Tomisawa
patent: 4835633 (1989-05-01), Edel et al.
patent: 4914644 (1990-04-01), Chen et al.
patent: 4965501 (1990-10-01), Hashimoto
patent: 5146440 (1992-09-01), Yamaguchi et al.
patent: 5369345 (1994-11-01), Phan et al.
patent: 5384524 (1995-01-01), Romano
patent: 5444582 (1995-08-01), Suzuki

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