Electronic circuit realization of weak signal detection based on Duffing oscillator
Zhao Jing-xiao · Journal of Circuits and Systems · 2011
In this paper,the principle and application of weak signal detection based on Duffing oscillator is analyzed.Then,we design the circuit of weak signal detection based on Duffing oscillator according to the system state equation.And the control test of the circuit that the sinusoidal signal frequency is 20Hz and 60Hz is researched.Finally,use the circuit to realize the weak sinusoidal signal detection under strong noise background by the phase relationship characteristic of sensitive to sinusoidal signal and immunity to noise.This study is a useful exploration in using hardware circuit to detect low-frequency signal under strong noise background.