Continental Automotive Gmbh

Siemens Aktiengesellschaft

Continental Automotive France

Matthias Huschenbett

Patric Heide

Ulrich Emmerling

Richard Roskosch

Roland Wagner

Luc Jansseune

Daniel Hostmann

Martin Kunert

Bernhard Förstl

Rupert Schuster

Stephanie Briese

Florian Weber

Disclosed is an access device of a vehicle having an on-vehicle control device configured to transmit enquiry signals to a mobile identification transmitter to determine the state of motion thereof, and adapt the transmission of the enquiry signals for a response signal received from the mobile identification transmitter containing the state of motion of the mobile identification transmitter, or on the basis of the absence of the response signal. Energy is saved in the event of a response signal containing a communicated stationary state of the mobile identification transmitter or in the absence of a response signal by reducing the frequency of the transmission of the enquiry signals.

Access device for a vehicle

An access apparatus (ZV) for a vehicle (FZ) has a vehicle-side position-determining device (PBE) for determining the position (POS, POS, POS) of a mobile identification signal generator (IDG) with respect to the vehicle. In addition, said access apparatus (ZV) has a vehicle-side control device (STE) for emitting location-determining signals (LS) to the mobile identification signal generator (IDG) for determining the position thereof. In this context, the vehicle-side control device (STE) is configured to control the frequency of the emission of the location-determining signals as a function of the position of the mobile identification signal generator with respect to the vehicle. In this way, the power consumption both in the vehicle and in the identification signal generator can be reduced on the basis of the location-dependent adaptation of the emission of the interrogation signals, without adversely affecting reliable operation of the access apparatus.

Access device for a vehicle (as amended)

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 detecting and correcting non-linearities in radio-frequency, voltage controlled oscillators provides for digitization of the frequency signal by feeding the undelayed frequency signal and a delayed frequency signal generated therefrom into EXOR gates. The digital pulses produced thereform are converted using a low pass filter into a proportional DC voltage value which is proportional to the oscillator frequency and is used as a basis for producing a correction value for the frequency control of the oscillator.

Method for detecting and correcting non-linearities in radio-frequency, voltage controlled oscillators

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Wuppertal, Germany

Matthias Huschenbett