Behavioral modeling of discrete domain sigma-delta modulators

The principles of over-sampled ADC are discussed firstly, and then focus on the relation between the order of modulator, over sampling rate and resolution in this paper. This discrete domain sigma-delta modulator is implemented in the MATLAB SIMULINK environment, and we provide the behavioral modeling and design flows. The proposed set of blocks takes into account most of the modulator nonidealities, such as noise, sampling jitter, and operational amplifier parameters. The experimental results obtained from low-pass second-order ΣΔ modulator.