Article ID: 2024CDP0001
In this paper, we propose a method to quantify the nonlinearity of the quantizer, which is one of the key nonlinear blocks in Delta-Sigma analog-to-digital converter (ΔΣ ADC) and the only one that is inherently nonlinear. By deriving the histogram of the components at the quantizer input other than the signal, it is possible to quantify the effective non-linearity in ΔΣ ADC, and quantify the effect of scaling factors such as the gains of the integrators on non-linearity. Quantizer non-linearity is evaluated through numerical calculations, complemented by analytical investigations with practical approximations. The comparison with the behavioral simulation results demonstrates the feasibility of the proposed analysis.
