![]() Mixed Signal Circuit System Prototyping: Automatic Guitar Tunerįinal project of Stanford EE 122A Analog Circuits Laboratory. The cost of the components and printed circuit board in total is estimated to be about $35, which can be deployed in remote areas where sophisticated and bulky medical equipment is not applicable. ![]() Power isolation for safety, analog signal acquisition and conditioning, digital sampling, wireless communication, and digital filtering have been implemented. We prototyped an Arduino shield for measuring and displaying ECG (electrocardiogram), ICG (impedance cardiogram), and PPG (photo plethysmogram) signals from human body. Microstructures and chemical compositions of the metal contacts were probed before and after the thermal storage.īiomedical Mixed Signal System Prototyping: ECG, ICG, PPGįinal project of Stanford EE 122B Introduction to Biomedical Electronics. Electrical characteristics of the metal contacts have been monitored over a long-term thermal storage test at 600C in air. Long-term thermal reliability of Ti/Al/Pt/Au ohmic contacts to GaN in an oxidizing ambient have been studied. High-Temperature Ohmic Contacts for Gallium Nitride Based Sensors and Electronics Electrical and optical measurements have been conducted to characterize the performances of the fabricated devices. The GaN MEMS devices have been micro-fabricated in Stanford Nanofabrication Facility. In this project, new MEMS device structures and high-temperature tolerant semiconductor materials are designed and modelled to overcome the reliability problems inherent to conventional designs. Monitoring chemical signitures of high-temperature combustion and manufacturing processes will enable significant saving of energy and prediction of catastrophies. ![]() Gallium Nitride (GaN) MEMS Platform for Chemical Sensing in High Temperatures Technology enthusiast, excited about technological innovations in energy, digital life, IoT, Cloud, AI, robotics, and science. Research Focuses: MEMS (Micro Electro-Mechanical Systems), Sensors, Nano-technology Researcher, Extreme Environment Microsystems Laboratory at Stanford led by Prof. Candidate, Electrical Engineering, Stanford University. ![]()
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