| 摘要 |
PURPOSE:To attain surely a prescribed inverting operation at a high speed by turning on alternately a couple of transistors (TRs) constituting an inverter in response to the change in the input signal even when the input signal having only an input level narrower than the power supply voltage is inputted. CONSTITUTION:When the input signal inputted to an input terminal IN is at a low level, a P-channel TR T7 is conductive and an N-channel TR T8 is nonconductive. When the input signal goes to a high level, even when the input signal level is at a level lower than the power supply voltage of the integrated circuit, since the input signal level is level-shifted by a prescribed amount by a level shift circuit 2 and inputted to a P-channel TR T7, the TR T7 is made surely nonconductive and only the other N-channel TR T8 is conducted. Thus, both a couple of the TRs T7, T8 are conducted. Then no excess power consump tion exists and the input circuit operated stably in high speed is obtained.
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