Apparatus for contactless energy and data transmission for singl

Details Apparatus for contactless energy and data transmission for singl Apparatus for contactless energy and data transmission for singl

1993-11-30

1995-12-05

Peng, John K.

Communications: electrical

Continuously variable indicating

With particular transmitter

34087032, 34087018, 34087025, 34082554, 455 41, 455 42, 455 60, 235380, G08C 1700

Patent

active

054733235

ABSTRACT:
An inductor transmission path for energy and data from a write/read station onto, for example, a chip card is disclosed. A specific, vector-oriented phase modulation with two coils is disclosed, making it possible for the write/read station to use the same method to service different cards, i.e. those with one coil, or with a large coil or having two coils.

REFERENCES:
patent: 4697183 (1987-09-01), Jenning et al.
patent: 4796028 (1989-01-01), Mackenthun et al.
patent: 4818855 (1989-04-01), Mongeon et al.
patent: 4857893 (1989-08-01), Carroll
patent: 5329274 (1994-07-01), Donig et al.
Imjela, "C2-Card (Contactless Chipcard)," Valvo Philips Bauelemente, Laboratory Report HTV 8902 of Oct. 11, 1989, pp. 1-30, published Jan. 1990.

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