Patent ID: 7840181

Claim:
A rectifier circuit, comprising: a first bias circuit that outputs a first direct-current voltage to charge a first capacitor based on a clock signal; a second bias circuit that outputs a second direct-current voltage to charge a second capacitor based on a clock signal; a first MOS transistor that has a gate and a source, the first direct-current voltage being applied between the gate and the source of the first MOS transistor to bias the gate of the first MOS transistor; a second MOS transistor that has a gate and a source, and a drain connected to the source of the first MOS transistor, the second direct-current voltage being applied between the gate and the source of the second MOS transistor to bias the gate 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.