Non-contact IC card with antenna switching circuit

Details Non-contact IC card with antenna switching circuit Non-contact IC card with antenna switching circuit

1997-08-01

1998-09-01

Hajec, Donald T.

Registers

Records

Conductive

235439, 34082534, 34082554, G06K 1906

Patent

active

058013725

ABSTRACT:
A batteryless non-contact type IC card using an electromagnetic wave as a communication medium includes an antenna resonance circuit for data transmission and reception, the antenna resonance circuit including first and second terminals; a bridge rectifying circuit coupled to the antenna resonance circuit for rectifying a signal from the antenna resonance circuit; and a switch for switching, in accordance with a switching signal, so that a lower-voltage is supplied to the first terminal of the antenna resonance circuit and a higher-voltage signal is extracted from the second terminal.

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