Control voltage generating circuit, constant current source circuit, and delay circuit and logic circuit including the same

A control voltage generating circuit comprising:

• a reference voltage generating unit that includes a plurality of first transistors of a same conductivity type connected in series between a first power supply and a second power supply, and generates a drain voltage of one of the plurality of first transistors as a reference voltage;
• and
• a voltage conversion unit that includes a plurality of second transistors connected in series between the first power supply and the second power supply and having the same conductivity type as that of the reference voltage generating unit, supplies the reference voltage to a gate of one of the plurality of second transistors, and outputs a drain voltage of one of the plurality of second transistors as a control voltage,
• wherein back gates of the first transistors and the second transistors are each connected to a third power supply, the third power supply being different from the first and second power supplies.

A semiconductor device comprising:

• a control voltage generating circuit;
• and
• at least one standard cell,
• wherein the control voltage generating circuit comprises:
• a reference voltage generating unit that includes a plurality of first transistors of a same conductivity type connected in series between a first power supply and a second power supply, and generates a drain voltage of one of the plurality of first transistors as a reference voltage;
• and
• a voltage conversion unit that includes a plurality of second transistors connected in series between the first power supply and the second power supply and having the same conductivity type as that of the reference voltage generating unit, supplies the reference voltage to a gate of one of the plurality of second transistors, and outputs a drain voltage of one of the plurality of second transistors as a control voltage, and
• wherein the control voltage generating circuit has a cell height substantially equal to a cell height of the standard cell.