The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 2004
Filed:
Aug. 22, 2001
Applicant:
Inventors:
Cornelis Maria Hart, Eindhoven, NL;
Ferdinand Jacob Sluijs, Eindhoven, NL;
Assignee:
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04Q 5/22 ; G08B 1/314 ;
U.S. Cl.
CPC ...
H04Q 5/22 ; G08B 1/314 ;
Abstract
An identification transponder for transferring an identification code to a base station by varying an RF-signal transmitted by the base station in a rhythm which corresponds to the identification code. The identification transponder comprises an identification code generator, a rectifier; and a load transistor. The load transistor is arranged in such a manner that it performs two tasks: the task of rectifying the RF-signal to provide the DC supply voltage for the transponder, and the task of supplying a variable load to the rectifier to thereby vary the RF-signal transmitted by the base station.