Electricity: motive power systems – Positional servo systems – Frequency- or phase-modulated systems
Patent
1998-01-28
2000-01-18
Nappi, Robert E.
Electricity: motive power systems
Positional servo systems
Frequency- or phase-modulated systems
388801, G05B 102
Patent
active
060160438
ABSTRACT:
A motor control circuit controls a motor in a disc drive is provided. The motor control circuit includes a commutation circuit which provides commutation signals to the motor to commutate the motor at a commutation frequency. A frequency modulation circuit is operably coupled to the commutation circuit. The frequency modulation circuit provides a modulation signal which frequency modulates the commutation frequency according to a predetermined pattern.
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Baker John M.
Francis Stuart K.
Korbel Garry E.
Motzko Andrew R.
Duda Rina I.
Nappi Robert E.
Seagate Technology Inc.
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