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:
Mar. 17, 2009
Filed:
Apr. 18, 2005
Peter Turban, Maxhütte-Haidhof, DE;
Herbert Zimmer, Regensburg, DE;
Peter Turban, Maxhütte-Haidhof, DE;
Herbert Zimmer, Regensburg, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A transponder has a transponder tuned circuit, an energy store or energy supply and a starter device. The transponder tuned circuit has a tuned circuit capacitor and a tuned circuit coil with an inductive coupling to a base station for inductive energy and/or data transmission. On transmission the energy store provides a discharge current Ice. The starter device is arranged between the transponder tuned circuit and the energy store such as to generate an adjustable reference voltage Uref, which, on transmission, controls the transmission voltage Us-TSK such that an envelope curve H for the transmission voltage Us-TSK is constant over a transmission duration ts, giving a constant discharge current Ice from the energy store to supply the transponder tuned circuit and a discharge voltage Uce dependent on the reference voltage Uref for the energy store falls linearly to the reference voltage Uref at a transmission end tE.