Rectifier circuit and radio communication device using the same
First Claim
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1. A radio communication device comprising:
- a rectifier circuit that includesa 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.
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Abstract
A rectifier circuit includes an input terminal that receives an alternating-current signal, a first rectifier circuit that generates a first direct-current voltage from the 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.
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Citations
6 Claims
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1. A radio communication device comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification