SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

PURPOSE:To form an IC circuit having a simple process and a stable detection logical level and allowed to secure a wide process margine. CONSTITUTION:A circuit 31 forming an FF consists of transistors (TRs) 32-35, an input signal is supplied from an input terminal 3 to the gate of an enhancement type TR32 and power supply voltage Vc as a reference voltage is inputted to the gate of a depression type TR34 to compare the potential of the input signal. A differential sense amplifier 38 amplifying voltage between terminals 36, 37 consists of TRs 39-51 and outputs an amplified result through an inverter consisting of TRs 52, 53. The logical level of the input signal is decided only by the difference in threshold voltage of the TRs 32, 34.