Demodulation circuit and RFID tag including the demodulation circuit
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United States of America Patent
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Jul 21, 2015
Grant Date -
Nov 28, 2013
app pub date -
Aug 6, 2013
filing date -
Feb 19, 2010
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Abstract
An object is to provide a demodulation circuit having a sufficient demodulation ability. Another object is to provide an RFID tag which uses a demodulation circuit having a sufficient demodulation ability. A material which enables a reverse current to be small enough, for example, an oxide semiconductor material, which is a wide bandgap semiconductor, is used in part of a transistor included in a demodulation circuit. By using the semiconductor material which enables a reverse current of a transistor to be small enough, a sufficient demodulation ability can be secured even when an electromagnetic wave having a high amplitude is received.
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