| 摘要 |
PURPOSE:To produce accurately a driving pulse voltage signal of a comparatively large amplitude with a low level of power consumption, by making use of a boosting function of a capacity element. CONSTITUTION:When an input signal v1 falls at a level L at a time point t1, both FET33 and 6 are turned off and the voltage v0 of an output terminal 11 rises up. Accordingly, the voltage rises up also at a point P. Then the voltage VP of a contact P rises up a voltage level H2 approximately double as high as the power supply voltage at a time point t1'. Therefore the source voltage of an FET7 is turned quickly to the power supply voltage Vd, and the voltage of the terminal 11 is set at Vd. An input signal v2 rises up to a high level H' at a time point t2, and FET4 and 8 are turned on. As a result, the voltage VP falls to a low level L and the voltage V0 is set at a low level L at a time point t2'. Thus the pulse voltage Q is obtained at the terminal 11 as shown by D. |
