Infineon Technologies Ag

Filippo Grillotti

Simone Fontanesi

Massimiliano Zilli

Alessandro Petri

Stephan Leisenheimer

Benjamin Kollmitzer

Richard Heinz

Andrea Possemato

A control circuit for a wheel speed sensor is provide. The control circuit includes an input interface configured to receive high-resolution wheel speed data and low-resolution wheel speed data; and circuitry configured to determine information on a functional state of the wheel speed sensor using the high-resolution data and the low-resolution data. The circuitry is configured to detect a failure state of the wheel speed sensor if a number of signal events which are signaled by the high-resolution wheel speed data between a first signal event and a second signal event deviates from an expected number. The first signal event and the second signal event are signaled by the low-resolution wheel speed data.

Control circuit for a sensor, an electrical control unit for a wheel speed sensor, a method of operating a wheel speed sensor, a method of controlling a sensor and a computer program

A control circuit is provided for a sensor that determines a sensed property. The control circuit includes an input interface configured to receive high-resolution data and low-resolution data for the sensed property. The control circuit further includes circuitry configured to determine information on a functional state of the sensor using the high-resolution data and the low-resolution data.

A periodic sensor signal representing a varying rotation angle detected by a rotation angle sensor is compared to a number of thresholds to detect threshold crossings of the periodic sensor signal. An output signal including a pulse pattern at the time of a threshold crossing may be generated only if the direction of rotation has not changed since an immediately preceding threshold crossing. A number of consecutive threshold crossings which take place without a change in the direction of rotation may be counted and an update of the offset register is performed only if the number of consecutive threshold crossings which take place without a change in the direction of rotation is equal to or higher less than the number of thresholds.

Operations using a periodic rotation angle sensor signal

A slave device may receive a clock signal from a master device via a bus. The slave device may detect a first pulse of the clock signal. The first pulse indicates that a bit is to be written to a slave shift register of the slave device. The slave device may identify a timeout threshold associated with the clock signal. The slave device may determine that the timeout threshold expired without a second pulse from the clock signal being detected. The slave device may reset, based on the timeout threshold expiring, the slave shift register to synchronize the slave shift register with a master shift register of the master device.

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Villach, Austria

Filippo Grillotti