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. 08, 2002
Filed:
Oct. 29, 1999
Thierry Roz, Prêles, CH;
EM Microelectronic-Marin SA, , CH;
Abstract
The present invention concerns an active transponder ( ) including an antenna ( ) for exchanging a radioelectric signal ( ), processing means ( ), an accumulator ( ) able to supply a first power supply signal (V ), and storage means ( ) able to store the power originating from the received radioelectric signal, and to supply a second power supply signal (V ). This transponder further includes: two means ( ) for comparing the two power supply signals to a minimum threshold (Vmin) and, in response, providing two control signals (V , V ); and charging means ( ) controlled by the two control signals, so that the accumulator can be charged, via the charging means, from the stored power. One advantage of such a transponder is that the accumulator can be automatically recharged, as soon as the latter is no longer sufficiently charged to assure the functions of the transponder.