Siemens Aktiengesellschaft

Continental Automotive Gmbh

Mark Elliott

Wolfgang Reiml

Stephan Bolz

Richard Pirkl

Achim Przymusinski

Walter Schrod

Dieter Sass

Herbert Zimmer

Roger Rouphael

Johann Falter

Gerhard Goeser

Markus Amtmann

Gerhard Fischer

Thomas Haug

Matthias Münch

Donald Preslar

Dieter Saβ

Peter Turban

Christoph Kleiner

Cyrille Brando

The transceiver features a fast de-excitation circuit, by means of which the transceiver can be very quickly de-energized or de-excited after sending of signals. The fast de-excitation circuit can be realized in the simplest case as a controllable switch with series-connected resistor. The transceiver is thus ready to receive signals again very fast, i.e. in the range of a few oscillation periods. With bidirectional data communication between transceiver and transponder the danger of malfunctions is avoided or at least reduced to a minimum level.

Transceiver and method for operating the transceiver

A transmit antenna () is supplied with energy by a power supply unit (). An electrical value characteristic for the transmit power is compared to a comparison value and the length of a time interval is measured in which the characteristic value at least reaches or exceeds the comparison value. Depending on the length of this time interval the transmit power is set.

Arrangement and method for setting a transmit power

In order to drive it with compatible electromagnetic interference, a circuit breaker is charged with a high charging current until the drain current exceeds a current threshold. The circuit breaker is then charged further with a smaller charging current associated with the desired rate of rise, until the drain voltage falls below a predefined voltage threshold. The circuit breaker is then charged further with the high charging current for a predefined period. In order to close the circuit breaker, a nearly reverse sequence is followed.

Method and device for driving a power output stage

A power output stage for switching inductive loads contains a series circuit having a load and a switching transistor. A series connected circuit formed of a blocking diode and a multiplicity of Zener diodes is disposed between the drain and gate electrodes of the switching transistor. A capacitor, a resistor or a series or parallel circuit of a capacitor and a resistor is disposed in parallel with at least one of the Zener diodes. The circuit configuration rounds off the pronounced kink in the drain voltage when the Zener protection cuts in during a switched state of the switching transistor.

Power output stage for switching inductive loads with reduced radiation emission

A capacitive actuator is driven with a control signal st. The duration ti of actual actuator actuation is compared with the duration t of the control signal st. Proper operation is determined, and the actuator is assumed to be operating correctly, if the measured duration ti is within a range determined by the duration t of the control signal.

Method of checking a capacitive actuator

A method for monitoring the operation of sensors in an internal combustion engine includes providing reference values from output signals from a sensor. A sliding average (comparison value) is calculated from a relatively large number of reference values. The operation of the sensor is diagnosed as a function of the amplitude distribution of the reference values about the comparison value. If a malfunction is found, a fault message is transmitted to the driver and reversionary running of the internal combustion engine is started. An electric controller operating in accordance with the sensor is also provided.

Method for monitoring the operation of sensors in an internal combustion engine, and electronic controller operating in accordance with the method

Growing community of inventors

Wuppertal, Germany

Mark Elliott