DEVICE WITH SPECTRAL PURITY FOR THE REMOTE EXCHANGE OF INFORMATION BETWEEN A PORTABLE OBJECT AND A STATION

摘要

The phase variation between the first and second alternating voltages (VEX and VEY), which is induced by the switchings of the electronic circuit of the portable object as a function of information to be transmitted to the station, enables the station-processing means (SPM) co deduce the said information therefrom.