Electricity: motive power systems – Positional servo systems
Patent
1997-06-10
1998-10-13
Masih, Karen
Electricity: motive power systems
Positional servo systems
318569, 318599, 318254, 318138, 318439, 318567, 318368, G05B 1101
Patent
active
058217177
ABSTRACT:
A system for driving a hard disk drive spindle motor is disclosed. The system comprises a spindle motor control circuit (120) and a spindle motor power circuit (220). The system also includes at least one disk (22) attached to a rotatable spindle (21) and a spindle motor (400) which receives power signals from the spindle motor power circuit (220) and controls the rotation of the spindle (21). The spindle motor control circuit (120) comprises a multiplexor (127) which transmits either a pulse width modulation signal or a current control signal in response to a mode selection signal, and a spindle predriver (125) which receives the multiplexor output signal and transmits spindle motor control signals to the spindle motor power circuit (220).
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Chloupek James E.
Hassan Mehedi
Whyte Robert E.
Donaldson Richard L.
Masih Karen
Petersen Bret J.
Swayze, Jr. W. Daniel
Texas Instruments Incorporated
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