Magnetic disk drive and voice coil motor drive circuit

Details Magnetic disk drive and voice coil motor drive circuit Magnetic disk drive and voice coil motor drive circuit

2005-03-08

2005-03-08

Ip, Paul (Department: 2837)

Electricity: motive power systems

Positional servo systems

C318S254100, C318S434000, C360S077020, C360S077130

Reexamination Certificate

active

06864656

ABSTRACT:
A magnetic disk drive that drives and positions an actuator using a voice coil motor, includes a current sensing resistor connected in series to a terminal on current input side of the voice coil motor, a first operational amplifier and a second operational amplifier. The magnetic disk drive further includes one of a third operational amplifier and a microcomputer.

REFERENCES:
patent: 5384676 (1995-01-01), Yokoyama et al.
patent: 5963393 (1999-10-01), Rowan et al.
patent: 6344721 (2002-02-01), Seki et al.
patent: 6363214 (2002-03-01), Merello et al.
patent: 20020071199 (2002-06-01), Kokami et al.
patent: 11-025625 (1999-01-01), None

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