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. 11, 2012
Filed:
Feb. 27, 2008
Christian Lamothe, Travers, CH;
Christian Lamothe, Travers, CH;
EM Microelectronic-Marin S.A., Marin, CH;
Abstract
A transponder circuit includes an antenna for receiving radio frequency signals and an extraction unit for extracting therefrom energy for the transponder circuit, a non volatile memory unit, a control logic unit that activates a received energy evaluation unit when a write operation is received. The evaluation unit is arranged directly at the antenna to provide the control logic unit with a signal representative of the status of energy available in the antenna indicating whether the available energy is greater than a minimum level for ensuring a proper write operation or not, wherein the control logic unit is arranged for performing, or not performing, the write operation. The evaluation unit includes a resistive divider including a set of resistors or a programmable current source and rectifier means on each connector of the antenna for simulating a write operation in the memory and energy recoverable by the power supply.