Weak Signal Detection of Pulse Waveform by Bistable Potential Circuit

Abstract

Stochastic resonance is a phenomenon where a weak signal is enhanced by adding an adequate amount of noise in a nonlinear system, such as a quartic potential system. In order to detect the high-speed bit rate and the weak signal with high precision, we studied the system parameters for the optimum performance of a quartic potential system using theoretical calculations, numerical analysis, and experimental evaluation. The results show that the response speed is proportional to a positive feedback factor and is inversely proportional to a damping factor. In particular, the results of the experimental evaluation show the effectiveness of increasing the response speed factor, which is defined as the value of the positive feedback factor divided by the damping factor, for improving the signal detection performance for high-speed bit rate (100 kb/s) signals.