Patent ID: 8810375
Filing Date: 2014-08-19
Classification: G06F,G06K,H01L,H02J,H04B

Abstract:
1. A semiconductor device comprising: an antenna circuit; a power supply circuit; and a signal control circuit, wherein the power supply circuit comprises: wherein the low-frequency signal generation circuit comprises: wherein the control circuit is configured to selectively supply power from the rectifier circuit and/or the battery to the power source circuit through the switching circuit, wherein power supplied by the control circuit is selected by the switching circuit to be supplied to the power source circuit when the output signal is a high signal, wherein the power supplied by the control circuit is selected by the switching circuit to be not supplied to the power source circuit when the output signal is a low signal, wherein the power source circuit comprises a circuit configured to generate a reference voltage, and wherein the power source circuit outputs the same potential as a potential of the reference voltage in a period depending on the duty ratio of the output signal when the power is supplied to the power source circuit by the switching circuit.