Noise-aided processing:: Revisiting dithering in a ΣΔ quantizer

In this paper, we show that a particular EA quantizer, which is a strongly nonlinear dynamical system, can provide noise-enhanced processing effects in some sense. In particular, we will show that quantizing a sine, which means adding a small amount of noise in the input, can improve the quantization process. In particular, the output local signal-to-noise ratio (SNR) exhibits a maximum when plotted against the noise amplitude.