| 摘要 |
PURPOSE:To obtain a circuit generating one pulse voltage when a voltage at an input terminal rises from grounding to the power supply voltage, by connecting three MOS transistors (TRs) among the power supply voltage, the grounding and the input. CONSTITUTION:The circuit is composed of the 1st MOS TRQ1, the source and gate of which are connected to a power supply Vcc, and the drain of which is connected to an output terminal OUT, the 2nd MOS TRQ2, the source of which is connected to the output terminal OUT, and the gate of which is connected to an internal terminal A, and the 2nd MOS TRQ3, the source of which is connected to the output terminal OUT and the gate, and the drain of which are connected to the terminal A. In this circuit, when a voltage applied to the input terminal IN changes from 0V to the power supply voltage Vcc, first, the Q2 and Q3 are conductive and then the Q2 is cut off to generate one pulse at the OUT. |
