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:
Jun. 02, 2015
Filed:
Feb. 13, 2013
Bernd Steegmann, Heiligenhaus, DE;
Boris Ziller, Ratingen, DE;
Bernd Steegmann, Heiligenhaus, DE;
Boris Ziller, Ratingen, DE;
HUF HUELSBECK & FUERST GMBH & CO., Velbert, DE;
Abstract
A portable identification transmitter for a passive access system of a motor vehicle includes an electrical buffer store which is coupled to an LF circuit assembly in order to charge the electrical buffer store via an energy draw from electromagnetic fields coupled in via LF antennas. Also included is an electronic switching device which can decouple a battery from a microcontroller of the passive access system. The microcontroller and the LF circuit assembly are coupled to the buffer store so that when the buffer store is charged beyond a specified charging level, the open electronic switching device can be activated to couple the battery to the microcomputer via the microcontroller while energy is supplied to the microcontroller from the buffer store.