Design and Trial Production FPGA based Stochastic Resonance Circuit Using LVDS and an Examination for Surface EMG Measurement

We propose a stochastic resonance (SR) circuit using LVDS, a differential input buffer in FPGAs, and report the results of its application to surface electromyography (sEMG) measurement. The proposed SR circuit obtained highly correlated waveforms with more than 0.9 of the correlation coefficients and the coefficient of determination for sinusoidal voltage with an amplitude of 1 mV. Furthermore, sEMG was measured as an application to biological signal measurement. The proposed circuit obtained highly correlated waveforms of more than 0.9 of the correlation coefficients with those acquired with the instrumentation amplifier and USB oscilloscope. These results suggest a novel stochastic AD conversion scheme using LVDS and its potential application to biological signal measurement.