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Sensing bandwidth of electrothermal MEMS transducers in constant voltage and current modes

This paper addresses effects of constant voltage and current biasing methods on sensing bandwidth of electrothermal displacement sensors in micro-electromechanical systems (MEMS). The dynamic response of the sensor is modeled based on first principles. The obtained model successfully captures a variety of nonlinear phenomena. Experiments are conducted to confirm the validity of the model and simulation results.