| 摘要 |
PURPOSE:To stabilize the supplied power source vltage potential to a load circuit by disconnecting the connection of a battery to a capacitor when the battery is connected to a switching load and supplying the power source voltage from the capacitor to the load circuit. CONSTITUTION:When a buzzer B is driven, relatively large current is supplied from a battery B, even if a voltage drop is produced by the internal resistance of the battery E so that the voltage of the battery E is lowered, voltages from power sources VSS1, VSS2 are supplied from the capacitors C1, C2 disconnected from the battery E and the buzzer B to the load circuit at the driving time. In this manner, the voltages of the power sources VSS1, VSS2 are not affected by the influence of the variation in the voltage of the battery E and are accordingly stabilized. When the drive of the buzzer B is finished, a switch SW3 disconnects the buzzer B from the battery E, and accordingly the battery E is reset to the stable level. |
