| 摘要 |
<p>Provided is a voltage switching circuit which outputs a voltage with low power consumption without lowering a plurality of voltages due to a threshold voltage of a transistor. The voltage switching circuit according to the present invention selects a voltage from among a plurality of input voltages in response to a selection signal and outputs the selected voltage from an output terminal. The voltage switching circuit includes: a first PMOS transistor for outputting a power supply voltage for operating a logic circuit of a semiconductor device to the output terminal; a second PMOS transistor for outputting a first voltage higher than the power supply voltage to the output terminal; a third PMOS transistor for outputting a second voltage lower than the power supply voltage to the output terminal; and a well potential control section for controlling well voltages of the first and third transistors to be the power supply voltage in a case of outputting the power supply voltage and the second voltage to the output terminal, and controlling the well voltages of the first and third transistors to be the first voltage in a case of outputting the first voltage to the output terminal.</p> |
