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. 31, 2017
Filed:
Oct. 11, 2012
Em Microelectronic-marin SA, Marin, CH;
Smartrac Technology Wehnrath Gmbh, Reichshof-Wehnrath, DE;
Michal Prazan, Prague, CZ;
Michal Prokes, Jesenice, CZ;
Jürgen Fehle, Ins, CH;
Ulrich Friedrich, Ellhofen, DE;
EM Microeclectronic-Marin SA, Marin, CH;
SMARTRAC TECHNOLOGY Wehnrath GmbH, Reichshof-Wehnrath, DE;
Abstract
The transponder comprises an antenna and a receiver circuit () for receiving RF signals, this receiver circuit is implemented with a control mechanism to activate it at least periodically in a listening mode. This receiver circuit is comprises a decoding circuit (), formed at least by a demodulator () and a decoder (), and a wake-up circuit (B) to analyze received RF signals in the listening mode and arranged for controlling the activation of the decoding circuit in this listening mode. The wake-up circuit comprises a frequency discriminator () and a digital modulation or preamble detector () downstream from a field clock generator (). The wake-up circuit receives as entry an alternating signal branched from the signal chain through the receiver circuit upstream from the demodulator and it activates the decoding circuit only when a modulation or a preamble is detected in a received RF signal by the digital modulation or preamble detector.