| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving circuit for a stepping motor capable of operating in a wide frequency range, by using a common power source and a general-purpose driver circuit. SOLUTION: This driving circuit is provided with Zener diodes ZD1 to ZD4 connected between a power supply terminal of a driver circuit U1 controlling an energizing control circuit connected to a winding M of a stepping motor and a power source, and between the output terminal of the driver circuit U1 and control signal input terminals of positive power switching transistors Tr1 to Tr6 of the power supply of the energizing control circuit respectively to set the Zener voltage of the Zener diodes ZD1 to ZD4 higher than or equal to a difference between the power source voltage and the maximum rated power supply voltage of the driver circuit U1. |
