Siemens Aktiengesellschaft

Continental Automotive Gmbh

Continental Automotive France

Bernhard Förstl

Ulrich Emmerling

Roland Wagner

Luc Jansseune

Matthias Huschenbett

Daniel Hostmann

Rupert Schuster

An electric circuit for controlling the access and immobilizing a vehicle has a first antenna driver () for driving a first antenna () for emitting a signal () in the event of identification of an ID transmitter () for access control of a vehicle. A second antenna driver () is provided for driving a second antenna () for emitting a signal () in the event of identification of an ID transmitter () for the immobilizer of the vehicle. In addition, the electric circuit has a receiver device () for receiving a signal captured by an antenna () for the identification of an ID transmitter () for the immobilizer. The first antenna driver () and the receiver device () are commonly integrated into a semiconductor chip ().

Electric circuit for an access control and for an immobilizer of a vehicle and method for calibrating an antenna driver

A method for the power-saving control of a receiving device, in particular for an access control system for an automobile, is disclosed wherein in an inquiry mode it is determined in response to a control signal Swhether a receive signal Sto be processed is supplied by a receiver unitof the receiving deviceto a controllerof the receiving device. The receiver unitand the controllerare, in response to the control signal S, simultaneously switched from a power-saving sleep mode in each case to an active mode in each case.

Method for the power-saving control of a receiving device, in particular for an access control system for an automobile, and a corresponding receiving device

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Ihrlerstein, Germany

Bernhard Förstl