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SENSOR ARRANGEMENT AND METHOD FOR OPERATING A SENSOR ARRANGEMENT | SENSORANORDNUNG UND VERFAHREN ZUM BETRIEB EINER SENSORANORDNUNG | AGENCEMENT DE CAPTEUR ET PROCÉDÉ POUR LE FAIRE FONCTIONNER

Patentnummer:EP3208923B1
IPC Hauptklasse:G01D0005244
Anmelder:ams AG (0)
Schloss Premstätten; Tobelbader Strasse 30, 8141 Unterpremstätten, AT
Erfinder:OBERHOFFNER, Gerhard (0)
Jauerburggasse 6, A-8010 Graz, AT
Anmeldung:17.02.16
Offenlegung:17.02.16
Patenterteilung:12.09.18

Abstract / Hauptanspruch
A sensor arrangement has a current mirror structure that is configured to provide respective base currents (10, I1,..., In-1) at each of a plurality of output current paths based on an input current. For each of the output current paths, a respective adjustment current source (IDACO, IDAC1, ..., IDACn-1) is provided that is digitally controllable and is connected to the respective output current path for adjusting the base current of said output current path. For each of the output current paths, a current biased sensor element (HE0, HE1, ..., HEn-1) is coupled in said output current path. The sensor arrangement further has a selection element (HMUX) for selectively connecting one of the output current paths to an evaluation block (EVAL) based on a selection signal (HEsel). The evaluation block is configured to generate a sensing value (VSMP) corresponding to a resulting current in the connected output current path, to compare the sensing value with an average value, and to update the average value based on the sensing value. A digital control (DC) is adapted for generating the selection signal and for digitally adjusting the respective adjustment current source of the connected output current path based on the comparison result.

EP3208923B1


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