MEMS (micro-electromechanical systems, a very mouthful word) are used as multiple hardware such as sensors, display chips, and switches. As the demand for Internet-of-things (IoT) increases, and MEMS which are used in embedded devices are increasingly important. However, wireless communication is an energy-expensive process in the overall energy budget, which needs to be low to ensure the small form factor of MEMs. Phase-locked loops (PLL), with their elegance in their simple design for complex behavior, can be used to provide an effective and efficient modulating system for MEMs, such as through frequency-shift keying (FSK).
This research project explored the use of the PLL-FSK demodulation circuit system using MATLAB Simulink, and consolidated some of the basic design principles for such demodulator circuits in MEMs. The project was supervised by Assistant Professor Zheng Yuanjin.
