| 摘要 |
PURPOSE:To diminish the capacity of a capacitor, by connecting a series circuit consisting of a diode and a capacitor, in parallel with an electric power source, connecting a resistance and a Zener diode in parallel with the capacitor, and connecting its connecting point to the base of a transistor. CONSTITUTION:The collector of a transistor (TR) Q and its emitter are connected to a switch S1 and a load L, respectively, a resistance R and a Zener diode ZD are connected to a connecting point of a diode D and a capacitor C which have been connected in parallel with an electric power source B through the switch S1, and the base of the TRQ is connected to its connecting point. Accordingly, when electric power is being supplied to the load through the TRQ, the capacitor C is charged with electricity, and in case when a motor M has been started by a switch S2, if supply voltage is reduced, a base current is made to flow into the TRQ through the resistance R from the capacitor C, therefore, constant voltage is applied to the load L through the TRQ. |
