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.
Block diagram of full Transceiver Module ( Transmit and Receive Chain including antenna and BPF with switch is expected ) After drawing it, questions related to sensitivity of RX chain , it's derivation with equation and after that a mathematical problem , was expected to find the final receiver sensitivity or noise floor to be specific for certain frequency band. After that question related to noise and small signal modeling and how to change gm of a Mosfet to reduce noise floor of previous question . Was expected to draw and complete small Signal modeling and then noise modeling and explain the situation .
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