Characterization engineer interview questions shared by candidates
You have a strain gauge with a nominal resistance of 10K and varies by only +/- 1% under maximum load. Design a circuit to measure this sensor with a output range of a full 0-5V. Part 2: If you needed 1000 different levels of digital accuracy, how many bits would you need in an ADC?
Use an instrumentation amplifier with a wheatstone bridge to measure the strain gauge. You need 10-bits in the ADC to get 1000 levels in the digital signal.
You have a metal sphere hanging from a spring in an elevator. You would like to measure the movement of the ball relative to the carriage throughout the day. A.) Come up with a list of devices you could use to measure the movement. B.) Use the capacitance formed by the ball and a metal plate on the elevator floor to create a measurement device for a microcontroller.
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