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:
Dec. 04, 2018
Filed:
Jun. 15, 2012
Jean-paul Caruana, La Seyne sur Mer, FR;
Grégory Capomaggio, Roquevaire, FR;
Christophe Buton, Gemenos, FR;
Jean-Paul Caruana, La Seyne sur Mer, FR;
Grégory Capomaggio, Roquevaire, FR;
Christophe Buton, Gemenos, FR;
GEMALTO SA, Meudon, FR;
Abstract
The present invention concerns a method of radio-frequency communication between a contactless transponder and a reader, in which at least one sideband of the carrier frequency is used for communicating a response from the transponder by modulation of the amplitude of this carrier frequency. The method is distinguished in that the modulation at least partly applies a modulation level greater than 100%, which causes a negative modulation. The invention also concerns a corresponding communication circuit.