Power protection for VCM control loop in hard disk drive...

Details Power protection for VCM control loop in hard disk drive... Power protection for VCM control loop in hard disk drive...

2006-10-25

2008-05-06

Tzeng, Fred F. (Department: 2627)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

Reexamination Certificate

active

07369350

ABSTRACT:
A VCM power protection circuit that limits the maximum voltage that can occur across any of the VCM's output FETs, while at the same time providing some bias on a VCM output to direct a head toward a landing zone during power-up or any time there is a higher than normal voltage on the power supply.

REFERENCES:
patent: 4200827 (1980-04-01), Oswald
patent: 6549359 (2003-04-01), Bennett et al.
patent: 6549361 (2003-04-01), Bennett et al.
patent: 6574062 (2003-06-01), Bennett et al.
patent: 6577465 (2003-06-01), Bennett et al.
patent: 7092197 (2006-08-01), El-Sherif et al.

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