Communication controller for an active transponder

Details Communication controller for an active transponder Communication controller for an active transponder

2005-02-03

2008-03-11

Hofsass, Jeffery (Department: 2612)

Communications: electrical

Selective

Interrogation response

C340S010340, C340S010410, C340S010510, C340S010520

Reexamination Certificate

active

07342482

ABSTRACT:
A method for processing of encoded information by a battery-powered active transponder is disclosed for the application within a transponder system for the wireless payment of road toll having the steps of receiving modulated microwave radiation of preset frequency by the transponder over the antenna and for obtaining an input signal demodulated for obtaining a binary input data sequence, feeding said binary input data sequence to a digital processor (microcontroller) operated by a processing clock of preset clock frequency for decoding and generating of a binary output data sequence, and forming an output signal from an answer to the received input signal within a certain duration.

REFERENCES:
patent: 4303904 (1981-12-01), Chasek
patent: 4325146 (1982-04-01), Lennington
patent: 5204675 (1993-04-01), Sekine
patent: 5621412 (1997-04-01), Sharpe et al.
patent: 5657008 (1997-08-01), Bantli
patent: 5724591 (1998-03-01), Hara et al.
patent: 6294953 (2001-09-01), Steeves
patent: 6317721 (2001-11-01), Hurta et al.

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