| 摘要 |
<p>PURPOSE:To simplify the structure and driving system of a power supply controlling system and to simplify the constitution of a power supply circuit, by using a memory element, a relay or a semiconductor switch element which is not normal self-support type and a control circuit. CONSTITUTION:When a switch C is turned on, a reset pulse generating circuit 5 generates a reset pulse E by the output voltage F of a power supply 4 of the control part. A control circuit 2 starts its operation when the pulse E changes to a high level from a low level after the voltage F is applied. In this case, a power supply 9 of a part B to be controlled is controlled by a power supply switch 7, and the control signal G is applied from the circuit 2. The self-supporting action is carried out through the circuit 2 and a memory element 3 which is held by a device 3'. The circuit 2 is reset to its initial state by the pulse E when the electric power H is applied and after the power H of the input side of the switch 7 is cut off. Thus the switch 7 is kept at a state set before the power H is cut off.</p> |
