Semiconductor integrated circuit device and contac

专利名称：Semiconductor integrated circuit device and

contactless IC card

发明人：Kazuki Watanabe,Yutaka Nakadai,Shinichi

Ozawa

申请号：US11432378申请日：20060512

公开号：US20060202043A1公开日：20060914

专利附图：

摘要：A semiconductor integrated circuit device (IC) and a contactless IC cardincluding a receiver circuit that is able to stably demodulate information signals

superimposed on AC signals from an interrogator. The receiver circuit included in the IC isequipped with antenna terminals, a power supply circuit, and a filter circuit. Theinformation signal from which a high frequency component was eliminated through thefilter circuit is input via a capacitor to an inverting input terminal of an operationalamplifier and a reference voltage is input to a non-inverting input terminal thereof. Afterthe information signal is fed back through a feedback path to the non-inverting inputterminal of the operational amplifier, that signal is amplified and the amplified

information signal is binarized by a binarizing circuit, thereby data transmitted from theinterrogator is demodulated. The contactless IC card comprises an antenna coil and theIC including this receiver circuit.

申请人：Kazuki Watanabe,Yutaka Nakadai,Shinichi Ozawa

地址：Kokubunji JP,Yachiyo JP,Hachioji JP

国籍：JP,JP,JP

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