| 摘要 |
PURPOSE:To bring an output to ''1'' only when an input becomes an intermediate value of both threshold values by applying an output of the 1st inverter circuit having a high threshold value and an output of the 2nd inverter having a low threshold value to an exclusive OR circuit. CONSTITUTION:The inverter 1 having a high threshold voltage and the inverter 2 having a low threshold voltage are connected in parallel and its output side is connected to an input terminal of the exclusive OR circuit 3. When the input is lower than the threshold voltage of the inverter 2, the output of the inverters 1, 2 is logical ''1'' and then, an output of the circuit 3 becomes logical ''0''. When the input is higher than the threshold voltage of the inverter 1, the output of the inverters 1, 2 is logical ''0'' and then the output of the circuit 3 is logical ''0''. Then, the input voltage is a value between the threshold voltages of the inverters 1, 2, the output of the inverter 1 is logical ''1'' and the output of the inverter 2 is logical ''0'' and then the output of the circuit 3 goes to ''1''. |
