CMOS disk drive motor control circuit having back-EMF blocking c

Details CMOS disk drive motor control circuit having back-EMF blocking c CMOS disk drive motor control circuit having back-EMF blocking c

1995-08-24

1996-05-28

Martin, David S.

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

318466, 360105, G05B 902

Patent

active

055214762

ABSTRACT:
A CMOS disk drive motor control circuit which has back-EMF blocking circuitry for preventing the back-EMF from being dissipated when power is removed from the disk drive motor. The back-EMF provides an alternate power source for parking the read/write head. The circuit is fabricated as a single CMOS integrated circuit which is coupled between a power supply and the disk drive motor. The circuit also includes disk drive head parking circuitry and voltage regulator circuitry.

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