Patent ID: 7245513
Filing Date: 2007-07-17
Classification: H01L,H01Q

Abstract:
1. A semiconductor integrated circuit device having a rectifier for converting AC voltage to DC voltage, the semiconductor integrated circuit comprising: a first power supply line for receiving the AC voltage; a second power supply line for receiving the AC voltage; a reference line; a first MOS transistor that is positioned between the first power supply line and the reference line and whose gate is connected to the second power supply line; a second MOS transistor that is positioned between the second power supply line and the reference line and whose gate is connected to the first power supply line; a first unidirectional device, one terminal of which is connected to the first power supply line and the other terminal of which is connected to an output terminal of the rectifier; a second unidirectional device, one terminal of which is connected to the second power supply line and the other terminal of which is connected to an output terminal of the rectifier; and control means for applying an AC voltage input to the first power supply line or an AC voltage input to the second power supply line, whichever is lower, to a bulk terminal of the first or second MOS transistor that is activated upon application of the AC voltage.