| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a power supply control circuit requiring a small number of components in which a signal susceptible to the battery voltage is not required to be inputted to the internal circuit, a pulse generation circuit utilizing a time constant susceptible to battery voltage variation is not used, and current consumption can be brought to zero during non-operation. <P>SOLUTION: The power supply control circuit comprises a switching element 2a for opening/closing a feeder line connecting the plus side of a battery 1 and an output terminal 8, an operating switch 3 having one end connected with the switching element 2a, and a switching element 2b connected between the other end of the operating switch 3 and the minus side of the battery 1 and outputting the state of the operating switch 3. When power is turned on, the one and the other ends are connected by closing the operating switch 3, and the feeder line is closed by turning the switching elements 2a and 2b on simultaneously thus supplying the output terminal 8 with power from the battery 1. When power is turned off, the one and the other ends are interrupted by opening the operating switch 3, and the feeder line is opened by turning the switching elements 2a and 2b off thus interrupting power supply to the output terminal 8 from the battery 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
