| 摘要 |
<p>A motor speed adjusting apparatus comprising a motor, a motor speed setting device such as an up-down counter, a programmable divider the divisor of which is programmed by the motor speed setting device, a reference signal generator, a phase comparator which generates a d.c. voltage corresponding to the phase difference between the reference frequency signal and the output signal of the programmable divider, and a voltage controlled oscillator which oscillates at a frequency corresponding to the output of the phase comparator. The motor speed is adjusted according to the output frequency of the oscillator by step deviation from the standard motor speed, and further that deviation is displayed by a display device controlled by the motor speed setting device.</p> |
