Fisrt Wearable MMG Recording
We demonstrated an experimentally proof of concept and small scale prototype built in a laboratory environment. Our prototype offers a small footprint, excellent sensitivity, ultralow noise, and high spatial resolution for recording muscle activities. This new miniaturised magnetic sensing system will replace the bulky, invasive and expensive laboratory instruments with easy-to-use wearable platforms.
Readout Circutry & Noise Control
We developed a real-time measurement system including a large array of sensors and an on-chip analog front-end to realise signal amplification, filtering, noise and drift cancellation. We also designed a dynamic geomagnetic field cancellation technique to reduce noise sources such as the acoustic noise and disturbances of magnetic and electric fields from the earth and surrounding equipment.
Sensor & Signal Simulations
We developed a finite-element method model of muscle sensors and evaluated its performance of the sensitivity and linearization range. It provided a reliable benchmark for modelling future hybrid magnetic-CMOS developments. We believe that this structure can offer a platform to develop ultra-sensitive, smart and scalable sensors for muscle sensing.