Method and circuit for monitoring the functioning of a sensor module

摘要

The monitoring method involves a monolithic sensor IC (1) within which available internal circuit measurement values are supplied as modulation signals which are superimposed on the supply voltage or current or the output measurement value (16) outputted as diagnosis values (17a). Either the internal circuit measurement values are output as an analog or a digital modulation and the output measurement value is output as a digital value, or the internal circuit measurement values are output as a digital modulation and the output measurement value is output as an analog value. An Independent claim is included for a monolithic IC sensor.