Drive signal generating device

Details Drive signal generating device Drive signal generating device

1991-05-06

1993-08-31

Ip, Paul

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

318560, 318561, 318254, 318138, 369 4429, 369 4434, 360 744, H02P 541, H02P 602

Patent

active

052412512

ABSTRACT:
A drive signal generating device for outputting a pulse signal to a spindle motor for driving a magnetic disk, to thereby rotate the motor in accordance with the pulse signal. The rotational speed of the motor is deter mined by the pulse width and pulse period of the pulse signal. The amplitude of the pulse signal is lowered as the source voltage of a power source is lowered, and the pulse period is shortened as the source voltage is lowered.

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