Custom Test Circuit Interface

What is the challenge? The modern car is full of sensors that continually monitor the operation of the vehicle. The onboard computer reads these signals, thousands of times every second, and makes adjustments to ensure the vehicle is operating efficiently and reliably. Some of the sensors use digital logic signals in the range of 5-12 volts. Other sensors use Variable Reluctance signals capable of outputs exceeding 100 volts. As technology improves, these voltages are expected to increase. We decided on +/- 350 volts as our maximum input range. The sensors themselves, must be tested to make sure they are giving accurate information to the computer. The output voltage is compared against the sensor specification to verify the signal is correct.



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