| 摘要 |
PURPOSE:To permit the common use of the title circuit excellently for different power supply voltages by leading short-circuit terminals for short-circuiting a predetermined number of rows of Zener diodes out of an integrating circuit. CONSTITUTION:When a driving coil 2 becomes the non-supplying condition of an electric power from the supplying condition of the same, a kickback pulse is returned to the base of a driving transistor 7 through a diode 12, a Zener diode row 11 and a diode 13 whereby the driving transistors 7, 8 are excited. On the contrary, when a driving coil 3 becomes the non-supplying condition of electric power from the supplying condition of the same, the kickback pulse excites the driving transistors 9, 10 in the same manner. When terminals 21, 22, which are led out, are short-circuited, the number (B-C) of the Zener diode row 11 is set so as to be the number of diodes, in which the generation of noise is slight even when the kickback pulse is absorbed when a second power supply voltage smaller than a first power supply voltage is used as a power supply voltage Vcc1. |
