| 摘要 |
A variable capacitance circuit includes a MOS capacitor, and an application voltage switching section configured to change an application voltage to the MOS capacitor to change a capacitance of the MOS capacitor. The variable capacitance circuit connects the MOS capacitor to an electronic circuit. Here, the electronic circuit may be a voltage amplification circuit, and the variable capacitance circuit may function as an amplification gain switching circuit configured to switch an amplification gain of the voltage amplification circuit, by changing the capacitance to be connected to the voltage amplification circuit. |
