| 摘要 |
PURPOSE: A CMOS inverter circuit capable of adjusting transition level of output signal is provided to vary input level which the output signal transits to freely by using a floating gate transistor. CONSTITUTION: The CMOS inverter circuit has the CMOS inverter part(510) and the controller(520). The CMOS inverter part(510) has the a PMOS transistor(P51) and the NMOS floating gate transistor(NFGT) which are connected to each other serially to take CMOS form. The controller(520) is connected to the NMOS floating gate transistor(NFGT) and controls threshold voltage by varying initial voltage applied to the floating gate. When the initial voltage is high, the floating gate voltage is increased to make the threshold voltage lower and the initial voltage is low, the floating gate voltage is reduced to make the threshold voltage higher.
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