Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Fraunhofer-gesellschaft Zur Förderung Der Angewandten Forschung E.v.

Elmar Herzer

Michael Hackner

Josef Sauerer

Ulrich Schlag

Roland MÜLLER

Bangalore Ramesh Akshay Agashe

A sensor arrangement has a current regulator, a reference resistance a feed current scaler and a sensor element having an internal resistance, the internal resistance of the sensor element and the reference resistance having a predetermined ratio. The current regulator is implemented to provide a reference current by the reference resistance and to change the reference current in response to an interference influence-conditioned change of the reference resistance such that the voltage decreasing across the reference resistance remains in a predetermined range around an applied set voltage. The current regulator is implemented to provide a feed current to the feed current scaler and to change a magnitude of the feed current depending on a magnitude of the reference current. The feed current scaler is implemented to feed a scaled feed current into the sensor element to scale a voltage according to the scaling of the feed current.

Sensor arrangement and method

A waveguide driving circuit for generating a current pulse in a waveguide includes a voltage source for providing a direct voltage, a choke the first terminal of which is coupled to a first terminal of the voltage source, a first switch the first terminal of which is coupled to a second terminal of the choke and the second terminal of which is coupled to a second terminal of the voltage source, the waveguide the first terminal of which at a first waveguide end is coupled to the first terminal of the first switch and the second terminal of which at the first waveguide end is coupled to a second terminal of the voltage source, and a controller implemented to open and close the first switch, to generate a current pulse at the terminals of the waveguide at the first waveguide end.

Circuit and method for generating a current pulse in a waveguide

The present invention is based on the finding that the evaluation of the sensor signals of a position sensor with a mechanical period or, in general terms, the cooperation between position sensors and evaluation units, can be improved by eliminating divergence between the electrically optimal period and the mechanically optimal period. According to the present invention this is achieved in that the position sensor signal, which has a period which depends on the mechanical period of the scale of the position sensor, is translated into a translated signal with a period which corresponds to a second mechanical period, which e.g. has been set to the electrically optimal period, prior to&#x2014;or for the purpose of&#x2014;transmitting it to an evaluation unit, whereby not only can transmission errors be minimized and the evaluability improved but a complicated mechanical adjustment of the scale of the position sensor relative to the evaluation unit is avoided.

Growing community of inventors

Erlangen, Germany

Elmar Herzer