Patent ID: 7978486
Filing Date: 2011-07-12
Classification: H02J,H02M

Abstract:
1. A radio communication device comprising: a rectifier circuit that includes a first rectifier circuit that generates a first direct-current voltage from an alternating-current signal; a bias-voltage generating circuit that generates a bias voltage from the first direct-current voltage; and a second rectifier circuit that generates a second direct-current voltage from the alternating-current signal biased with the bias voltage, wherein the second rectifier circuit includes a metal-oxide-semiconductor MOS transistor, the bias voltage being applied to a gate of the MOS transistor, the alternating-current signal being input to a drain of the MOS transistor; an antenna that generates the alternating-current signal; and a signal processing circuit that receives the second direct-current voltage as a power supply voltage and demodulates the second direct-current voltage thereby obtaining a communication signal.