Real time automatic fault testing in analogue-to-digital converters used in automobile engine and transmission control systems

摘要

Method entails using circuit including a fault test circuit (102) which includes a first switch connected to receive a first reference voltage, a second switch connected to receive a second reference voltage, and output connected to receive the first or second reference voltage and to send the voltage to the input of AD converter (206). An automatic test controller (202) controls the switches, and a sequencer and state controller (210) analyze the digital output signal of the converter. AN Independent claim is included for fault detection circuit.