| 摘要 |
PURPOSE:To prevent the inconvenience such as burnout by providing a level switching circuit which instructs the drop of an energizing level to a coil at the stopping time, thereby reducing the heat of the coil at the stopping time. CONSTITUTION:Since a clock signal is outputted from a clock generator 1 at the time of driving a motor, the output of a retriggerable monostable multivibrator 8 becomes ''H'' level. Accordingly, a level switching circuit 9 outputs the output of a triangular wave generator 10 as it is, and a current of the prescribed level is flowed to the coils. Since the output is eliminated from the generator 1 at the stopping time, the output of the multivibrator 8 becomes ''L'' level, and the circuit 9 attenuates the triangular wave outputted from the generator 10 to approx. 1/2, and the current flowed to the coils accordingly decreases. |
