| 摘要 |
PURPOSE:To protect a ''completion of explosion'' signal against adverse influence even if an ON-terminal is disconnected momentarily at the time of changing the mode of a key switch, by providing a starter signal with a parallel circuit of a resistance and a capacitor, a grounded circuit and an inverter output circuit. CONSTITUTION:A capacitor C1 is charged in response to a starter signal (11). The capacitor C1 discharges to the input side of a first inverter I1 via a resistance R1, so that the inverter I1 is kept in the state before it is disconnected momentarily and this state is maintained by the function of a positive feedback circuit. With such an arrangement, both of the ''completion of explosion'' signal and ''before completion of explosion'' signal are maintained without malfunctioning and operation is not affected adversely when the ON-terminal ON is connected again, so that the apparatus can be operated normally. |
