Method for the transmission of information and base station for

Details Method for the transmission of information and base station for Method for the transmission of information and base station for

1997-03-05

2000-04-11

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

340571, 340572, 342 51, H04Q 522

Patent

active

060492929

ABSTRACT:
Contactless transmission of information from a passive transponder to a base station takes place in known manner by load modulation in the transponder. The coils of resonant circuits in the base station and in the transponder are coupled to one another, both resonant circuits being tuned as well as possible to the carrier frequency of the base station so that the load modulation of the resonant circuit in the transponder influences the current in the resonant circuit of the base station. Because the two resonant circuits often are not tuned exactly to one another in practice and the transponder is also liable to be moved during the information transmission, it may occur that no signal is recovered by conventional demodulation in the base station. Therefore, according to the invention it is proposed to demodulate an imaginary component and a real component, or different combinations thereof, separately from the antenna signal in the base station and to combine these components by way of a logic circuit which provides notably mutual latching of the two channels. This enables more reliable recovery in the base station of the information transmitted by the transponder.

REFERENCES:
patent: 5235326 (1993-08-01), Beigel et al.
patent: 5377226 (1994-12-01), Davis
patent: 5616966 (1997-04-01), Fischer et al.
patent: 5673037 (1997-09-01), Cesar et al.

Affiliated with

Also associated with

Rating

Method for the transmission of information and base station for 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 the transmission of information and base station for , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the transmission of information and base station for will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1180083