Parametric modeling and simulation of unknown ADCs via MATLAB SIMULINK

The modeling methods for ADCs are generally divided into circuit level and system level, in this paper we consider the non-ideal parameters of general ADCs and select THD and ENOB as the parameters for modeling, and model the ADCs through MATLAB SIMULINK to realize the modeling simulation of unknown ADCs. Harmonics are modeled in the form of polynomials, the noise that causes the difference between SNR and SNDR is considered and introduced into the Gaussian white noise channel, the effects of these noises are added to the model, and finally all the above sub-modules are placed through serial to achieve the modeling simulation of an unknown ADC. Subsequent comparisons by way of adding single-tone signals versus two-tone signals and with actual measurements of two ADCs reveal that the ADC model obtained using this modeling method can be modeled more accurately for SFDRs not exceeding 70 dB.