Portable object having multi-level demodulation and being...

Details Portable object having multi-level demodulation and being... Portable object having multi-level demodulation and being...

2004-09-14

2009-08-18

Le, Thien M (Department: 2887)

Registers

Coded record sensors

C235S492000

Reexamination Certificate

active

07575165

ABSTRACT:
A remote transmission device having a fixed station and a portable object provided with an antenna inductively coupled to the station, the object having a variable load impedance connected to terminals of the antenna, and a regulation loop regulating the voltage at terminals of the variable load impedance having rectifier means for rectifying the voltage at the terminals of the antenna and control means designed to modify the variable load impedance according to the output voltage of the rectifier means, and the station emitting an alternating magnetic field modulated in amplitude on 2Nlevels by data to be transmitted, encoded on N bits, the object having demodulation means having an n-bit analog to digital converter, clocked at an oversampling frequency much higher than the frequency of the data and connected between the rectifier means and the control means, and digital processing means connected to the output of the converter.

REFERENCES:
patent: 6028503 (2000-02-01), Preishuberpflugl et al.
patent: 2005/0225436 (2005-10-01), Diorio et al.
patent: 2008/0087723 (2008-04-01), Kargl et al.
patent: 2008/0157928 (2008-07-01), Butler et al.
patent: 2008/0164977 (2008-07-01), Butler et al.
patent: 2008/0180249 (2008-07-01), Butler et al.
patent: 2008/0186138 (2008-08-01), Butler et al.
patent: WO 00/03352 (2000-01-01), None
patent: WO 00/63830 (2000-10-01), None
Ribner; “A Comparison of Modulator Networks for High-Order Oversampled ΣΔ Analog-to-Digital Converters”; IEEE Transactions on Circuits and Systems; Feb. 1991; No. 2; pp. 145-159.

Affiliated with

Also associated with

Rating

Portable object having multi-level demodulation and being... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Portable object having multi-level demodulation and being..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable object having multi-level demodulation and being... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4056614