CARRIER SIGNAL PATTERN DEMODULATOR
Original Publication Date: 2000-May-01
Included in the Prior Art Database: 2002-Sep-23
A method of detecting data in an electronic reader interface, received from a contact less smart card or tag transponder, in which the reader supplies power to the contact less card or transponder via a radio frequency transmit loop antenna. The same transmit antenna is also used to receive back scattered signal from the card or tag device which is perfonned with an admittance load switching device inside the card device.