SEMICONDUCTOR LOGICAL CIRCUIT

摘要

PROBLEM TO BE SOLVED: To secure reliability and to prevent the deterioration in operating speed in lower power supply voltage by providing a control circuit supplying a voltage lower than power supply voltage on the high potential side for the gate of an N-channel MOS transistor for dividing voltage when an output signal is at a high level and supplying a voltage higher than the power supply voltage on the high potential side as a control signal when the output signal is at a low level. SOLUTION: A pull-up side MOS transistor Tr1 , a channel MOS transistor for dividing voltage Tr3 and a pull-down side MOS transistor Tr2 are serially connected between the power supply voltage on the high potential side Vcc and a power supply voltage on the low potential side Vss , and a control circuit 1 is connected. Then the control circuit 1 supplies a voltage lower than the level of the power supply voltage on the high potential side Vcc turning on the channel MOS transistor for dividing voltage Tr3 as a control signalϕ1 when the output signal OUT is at a high level and supplies a voltage higher than the power supply voltage on the high potential side Vcc as the control signalϕ1 when the output signal OUT is at a low level.