Patent · US Expired

Data carrier having rectifier and improved voltage limiter

US6304613A · kind A · utility

19Cited by

10References

28Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Manfred Koller · Obbach, DE
Peter Thüringer · Graz, AT

Key dates

Filing date	May 3, 1999
Grant date	Oct 16, 2001
Priority date	—
Expiry date	May 3, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG06K19/0723
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A data carrier processing system is provided for receiving an amplitude-modulated carrier signal. The system includes rectifiers and a voltage limiter that limits the d.c. supply voltage that is provided by the rectifiers. The voltage limiter provides a delayed response to amplitude variations in the carrier signal, so as to avoid adverse effects on the modulation of the carrier signal, while also providing an un-delayed response to excess amplitude values, so as to avoid excessive d.c. supply voltage for circuit elements of the data carrier system.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.