International Journal of Industrial Electronics and Electrical Engineering(IJIEEE).
Paper Title - Behavioral Modeling Of Sigma-Delta Modulator Non-Idealities With Two Step Quantization In Matlab/Simulink
An architecture to simplify the circuit implementation of analog-to-digital (A/D) converter in a sigma-delta (ΣΔ)
modulator is proposed. The two-step quantization technique is utilized to design architecture of ΣΔ modulator. The
architecture is based on dividing the A/D conversion into two time steps for achieving resolution improvement without
decreasing speed. The novel architecture is designed to obtain high dynamic range of input signal, high signal-to-noise ratio
and high reliability.
Switched capacitor (SC) modulator performance is prone to various nonidealities, which affects overall circuit performance.
In this paper a set of models are proposed which takes into account SC ΣΔ modulator nonidealities, such as sampling jitter,
kT/C noise, and operational amplifier parameters (noise, finite dc gain, finite bandwidth, slew-rate and saturation voltages).
Each nonidealities are modelled mathematically and their behaviour is verified using different analysis in MATLAB
Simulink. Simulation results on a second-order SC ΣΔ modulator with two step quantization demonstrate the validity of the