Patent ID: 7853236
Filing Date: 2010-12-14
Classification: G06K

Abstract:
1. A rectifier circuit comprising: a first MOS transistor; a first capacitor configured to connect between a gate and a source of the first MOS transistor; a first switching circuit configured to supply a bias voltage to the first capacitor in response to a control signal; a second MOS transistor whose drain is connected to the source of the first MOS transistor; a second capacitor configured to connect between a gate and a source of the second MOS transistor; a second switching circuit configured to supply the bias voltage to the second capacitor in response to the control signal; a third MOS transistor configured to imitate the first MOS transistor; a third capacitor configured to imitate the first capacitor; a fourth capacitor connected between a drain of the first MOS transistor and the source of the second MOS transistor, a direct current being supplied through the fourth capacitor with respect to an alternating current supplied to the source of the first MOS transistor; a dummy switching circuit configured to supply the bias voltage to the third capacitor in response to the control signal; and a generating circuit configured to generate the control signal based on a potential of the third capacitor.