Development of EMG circuit for detection of leg movement

This research focuses on development of EMG circuit to detect the EMG signal from quadriceps muscle. The circuit used Surface self-adhesive electrodes to capture muscle activity during the knee extension. The two electrodes were placed at a distance of 10mm from each other in the middle rectus femoris muscle. This is the initial effort to investigate the output signal stage by stage from EMG circuit that consists of several circuits specifically amplification, filtering and rectification. Experimental analysis results based on five subjects showed that the output signal from EMG circuit has successfully deliver the voltage output as required for the next analysis stage. The circuit was tested on all five healthy subjects with different leg dominant for data acquisition for further signal analysis.