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:
Apr. 19, 2011
Filed:
Oct. 16, 2006
Bernhard Spiess, Graz, AT;
Pamir Erdeniz, Graz, AT;
Michael Zenz, Deutschfeistritz, AT;
NXP B.V., Eindhoven, NL;
Abstract
An electronic circuit (') for a reader device (′) for contactless communication with a transponder () is disclosed. The electronic circuit (′) comprises a connection () to an antenna () of said reader device (′), which antenna () is designed for receiving a radio signal (TRS) from said transponder (). Furthermore, it comprises a receiving module (), which is connected to the antenna connection () and arranged for processing an input voltage (VI) from said antenna () representing said radio signal (TRS). To provide satisfactory operation of the receiving module () and to compensate a bad matching of the antenna circuit to the electronic circuit (′) and/or bad environmental conditions where the reader device (′) is operated, the electronic circuit furthermore comprises a control module (′). Said control module (′) is arranged to compare said input voltage (VI) to a reference value (VR) and to adjust a plant of said reader device (′) in such a manner that the level of said input voltage (VI) stays in a predefined range. The invention furthermore relates to a reader device (′) and a method of operating a reader device (′).