Patent ID: 8127998

Claim:
A semiconductor device comprising: an antenna; a first circuit electrically connected to the antenna, wherein the first circuit comprises a first charge pump, a second charge pump, a third charge pump, and a first switch disposed between the second charge pump and the third charge pump; a second circuit configured to generate a reference voltage in accordance with a first output voltage supplied from the first charge pump; and a third circuit configured to compare the reference voltage with a second output voltage supplied from the second charge pump to generate an output signal, wherein the first switch is turned on or off in accordance with the output signal, wherein an output terminal of the first charge pump is electrically connected to an input terminal of the second charge pump and the second circuit, wherein an output terminal of the second charge pump is electrically connected to a first terminal of the first switch and the third circuit, and wherein a second terminal of the first switch is electrically connected to an input terminal of the third charge pump.