SENSOR INTERFACES FOR FUNCTIONAL SAFETY APPLICATIONS

A sensor interface circuit (100) comprising: at least two sensor inputs (111, 112) and at least two front-end circuits (121, 122) to obtain sensor signal acquisitions from the at least two sensor inputs; a test circuit (131, 132) configured to test correct functionality of at least part of one of th...

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Bibliographische Detailangaben
1. Verfasser:	VERGAUWEN, Johan
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR PHYSICS TARIFF METERING APPARATUS TESTING
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Beschreibung
Zusammenfassung:	A sensor interface circuit (100) comprising: at least two sensor inputs (111, 112) and at least two front-end circuits (121, 122) to obtain sensor signal acquisitions from the at least two sensor inputs; a test circuit (131, 132) configured to test correct functionality of at least part of one of the front end circuits (121, 122) by applying a test input to the front end circuit under test, by reading a test output of the front end circuit, and by comparing the test output with an expected result thus obtaining at least one test result, wherein the test input is applied intermittently between sensor signal acquisitions; a processing device (140) configured for comparing the sensor signal acquisitions from the different sensor inputs and for combining the comparison with the at least one test result in order to evaluate correct functionality of the sensor interface circuit.