| 摘要 |
PURPOSE:To obtain a sequential timer capable of controlling not only a single device but also plural devices by connecting ground side of a resistor at ground side for gate voltage of a PUT oscillating circuit to an open collector output section. CONSTITUTION:In Figure, A is a long time timer circuit which has an open collector output (a), and B is the PUT oscillating circuit where the ground side of the resistor Rb at ground side for gate voltage is connected to the open collector (a). Suppose that an ''H'' output ( Vcc power supply voltage) of the output (a) of the timer circuit A goes to ''L'' output ( Ov ground potential) after a timer time T, even if a timer capacitor Ct of the PUT oscillating circuit B is charged up to the power supply voltage Vcc through a charging resistor Rt with the power supply Vcc turned on, an output OUT remains ''L'' output. When the output (a) goes to ''L'' after the timer time T, a PUT pulse output is generated via a gate resistor Rc. That is, the PUT oscillating period determined by the Ct, Rt is synchronized with the timer circuit and the oscillation is started in the period (t). |
