Methods and apparatus to lock a phase lock loop to a motor

Details Methods and apparatus to lock a phase lock loop to a motor Methods and apparatus to lock a phase lock loop to a motor

2011-06-14

2011-06-14

Duda, Rina I (Department: 2837)

Electricity: motive power systems

Positional servo systems

'reset' systems

C318S610000

Reexamination Certificate

active

07960936

ABSTRACT:
Methods and apparatus to lock a phase lock loop to a spindle motor are disclosed. An example controller comprises a counter to determine a period of an operating signal received from a motor, an oscillator to generate a control signal based on an input signal, and an initializer to generate the input value based on the period, wherein the input value causes the oscillator to generate the control signal having the same phase as the operating signal.

REFERENCES:
patent: 5631999 (1997-05-01), Dinsmore
patent: 6160368 (2000-12-01), Plutowski
patent: 6215261 (2001-04-01), Becerra
patent: 6285521 (2001-09-01), Hussein
patent: 6900604 (2005-05-01), Kokami et al.
patent: 7034478 (2006-04-01), Bhaumik et al.

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