| 摘要 |
For efficient pulse motor drive over a wide speed range, two drive-current control methods are switched in accordance with the speed of the pulse motor. As the first method, a PWM control method generates a pulsewidth modulation signal in accordance with a value indicated by a current control pattern. The pulse-motor drive current is controlled by voltage corresponding to the pulsewidth. As the second method, a BIT control method generates a digital signal corresponding to the value indicated by the current control pattern. The pulse-motor drive current is controlled by voltage corresponding to the digital value.
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