Efficient hard disk drive energy recovery circuit and method...

Details Efficient hard disk drive energy recovery circuit and method... Efficient hard disk drive energy recovery circuit and method...

2005-09-06

2005-09-06

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

C360S071000, C360S073010

Reexamination Certificate

active

06940675

ABSTRACT:
A hard disk drive energy recovery circuit, a method of recovering energy from a motor of a hard disk drive and a hard disk drive. In one embodiment, the hard disk drive energy recovery circuit includes (1) a spindle resolver that generates transition signals as a spindle motor of the hard disk drive rotates among angular regions, (2) a spindle region state machine, coupled to the spindle resolver, that receives the transition signals and generates rectifier drive signals based thereon and (3) a synchronous rectifier, coupled to the spindle region state machine, that employs the rectifier drive signals to recover electrical energy from the motor.

REFERENCES:
patent: 5493201 (1996-02-01), Baker
patent: 2002/0043954 (2002-04-01), Hallidy
patent: 2003/0075997 (2003-04-01), Keim et al.

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