Method for wireless transmission of data to a data carrier

Details Method for wireless transmission of data to a data carrier Method for wireless transmission of data to a data carrier

1992-02-21

1994-02-15

Sheppard, John

Registers

Systems controlled by data bearing records

Credit or identification card systems

235449, G06K 1700

Patent

active

052869555

ABSTRACT:
A method is described of wireless transmission of data onto a data carrier, in particular onto a chip card or IC card, by said data carrier being placed in a high-frequency field. To carry out amplitude keying, the field is switched on and off, with the information being here the number of periods transmitted between two transmission intervals. The semiconductor circuit accommodated in the data carrier receives its clock from the received high-frequency field or from an oscillator allocated to the semiconductor circuit, with this clock being off during a transmission gap.

REFERENCES:
patent: 4546241 (1985-10-01), Walton
patent: 4791285 (1988-12-01), Ohki
patent: 5030807 (1991-07-01), Landt et al.
Wigand, Die Karte mit dem Chip, Verlag Siemens AG, 1991, Berlin, Munchen, pp. 34-36.

Affiliated with

Also associated with

Rating

Method for wireless transmission of data to a data carrier does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for wireless transmission of data to a data carrier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for wireless transmission of data to a data carrier will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1209163