Integrated semiconductor circuit having analog and logic circuits

A semiconductor device comprising:

• an analog circuit comprised of a plurality of first n channel type MOS transistors and a plurality of first p channel type MOS transistors, wherein said analog circuit receives an analog input signal and outputs a first logic signal having a first or a second voltage by changing an amount of current flowing therein in response to a voltage of the analog input signal;
• and
• a logic circuit connected to the analog circuit and comprised of a plurality of second n channel type MOS transistors and plurality of second p channel type MOS transistors, wherein said logic circuit receives the first logic signal from the analog circuit and outputs a second logic signal having the first or second voltage in response to the first logic signal,
• wherein absolute threshold voltages of said first n and p channel type MOS transistors are smaller than absolute threshold voltages of said second n and p channel type MOS transistors, and
• wherein Vtn1+|Vtp1|<Vcc, Vcc<Vtn2+|Vtp2|<2Vcc, Vtn2<Vcc, and |Vtp2|<Vcc, where Vtn1 denotes a threshold voltage of said first n channel type MOS transistors, Vtp1 denotes a threshold voltage of said first p channel type MOS transistors, Vtn2 denotes a threshold voltage of said second n channel type MOS transistor, Vtp2 denotes a threshold voltage of said second p channel type MOS transistor, and Vcc and GND denotes said first voltage and said second voltage and said second voltage, respectively.