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.
TRAGBARER IDENTIFIKATIONSGEBER FÜR EIN PASSIVES ZUGANGSSYSTEM EINES KRAFTFAHRZEUGS UND VERFAHREN ZUM ENERGIESPARENDEN BETREIBEN DES IDENTIFIKATIONSGEBERS
PORTABLE IDENTIFICATION TRANSMITTER FOR A PASSIVE ACCESS SYSTEM OF A MOTOR VEHICLE AND METHOD FOR THE ENERGY-SAVING OPERATION OF THE IDENTIFICATION TRANSMITTER
CAPTEUR D'IDENTIFICATION PORTATIF POUR SYSTÈME D'ACCÈS PASSIF À UN VÉHICULE AUTOMOBILE ET PROCÉDÉ ÉCONOME EN ÉNERGIE PERMETTANT DE FAIRE FONCTIONNER LE CAPTEUR D'IDENTIFICATION
2017-06-21
Patent
Electronic Resource
German
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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