Abstract Stochastic Resonance is a phenomenon first discovered in 1981. The phenomenon describes that under certain conditions, in a non-linear system, a noise added to an input can make the input signal pass the non-linear barrier. This study will investigate how the shape of the input signal wave can affect the output efficiency. A circuit with a noise source, an AC source, a Schmitt trigger (act as the non-linear system) is simulated. Various shapes of the wave were tested in the simulator, which resulted in different spectrums and voltage-time graphs of the output and output efficiencies. After comparing the results for different wave shapes, the pulse wave and the square wave are observed to have the highest output efficiency and signal-to-noise ratio, followed by sinusoidal wave, triangular wave, and sawtooth wave in that order.
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