Patent ID: 7890054

Claim:
A rectifier circuit comprising: a bias circuit that outputs a first direct-current voltage and a second direct-current voltage, and includes a first switching unit that is connected to a predetermined voltage source, a first capacitor unit that holds voltages supplied through the first switching unit, a second switching unit that is connected to the first capacitor unit, operation of the second switching unit being complementary with operation of the first switching unit, and a second capacitor unit that holds voltages supplied through the second switching unit as the first and second direct-current voltages; a first MOS transistor that has a gate and a source, only the first direct-current voltage being applied between the gate and the source of the first MOS transistor; a second MOS transistor that has a gate, a source, and a drain connected to the source of the first MOS transistor, only the second direct-current voltage being applied between the gate and the source of the second MOS transistor; and a coupling capacitor that has a first end which is connected to the source of the first MOS transistor, and a second end to which an alternating-current signal is input.