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:
Aug. 27, 2013
Filed:
May. 13, 2009
Harald Witschnig, Linz, AT;
Elisabeth Sonnleitner, Graz, AT;
Harald Witschnig, Linz, AT;
Elisabeth Sonnleitner, Graz, AT;
NXP B.V., Eindhoven, NL;
Abstract
An RFID transponder () comprises a demodulator () for demodulating received phase modulated carrier signals (CSQ), converting them down to a modulated baseband signal (MS) and filtering the converted signal. Sampling means () sample the filtered signal (FS) and store an actual sampling value (S(t)) and a previous sampling value (S(t)) of the filtered signal (FS). Subtracting means () calculate a difference (DS) between the actual sample value (S(t)) and the previous sample value (S(t)). Difference evaluation means () evaluate the difference (DS) according to the following criteria: a. if the difference is positive and outside of a predefined zero range (ZR) a first logical value is determined; b. if the difference is negative and outside of the zero range a second logical value is determined; c. if the difference is within the zero range the logical value of the latest evaluation is kept.