PURPOSE: To prevent surely the runaway of a controller by allowing the circuit to cut off the power supply to a load when no control signal is applied so as to apply initial reset of the load.
CONSTITUTION: An input voltage at a terminal 1 is applied to a controller including a microcomputer via a transistor (TR) 56 of a switching circuit and a stabilized power supply 4 only when an intermittent control signal (a) is applied to a terminal 2. A signal generating circuit comprising resistors 20W27, capacitors 28W31, and TRs32W35 generates an intermittent output signal when the control signal (a) is not applied over a prescribed time depending on a charging time constant comprising the capacitor 29 and the resistor 27 to the terminal 2. The output signal intermits the power supply fed to the controller by turning on/ off the TR56. Since the controller has an initial reset function, the reset operation is conducted surely by the intermission of the said power supply.
WADA KIYOSHI
TAKEDA HITOSHI
SHIBATA HIROMI
| JPS5748143A | 1982-03-19 | |||
| JPS57164320A | 1982-10-08 |
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