A metrological approach to the investigation of the quantization noise of delta-sigma ADCs
ABSTRACT A metrological approach to the analysis of the quantization noise of delta-sigma analog-to-digital converters is proposed.
The difference between the two signals at the modulator output and the ideal signals are determined. The dependence of the
quantization noise on the amplitude of the input signal and on the frequency band is obtained.
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ABSTRACT: This paper presents an overview of DelSi, a MATLAB toolbox developed for the design and simulation of delta–sigma modulators. The DelSi toolbox can synthesize a stable noise-transfer function for complex network structures. The modelling tool consists of two c/c++ programs, sdMod.c, a single stage delta–sigma modulator and firfilt.c, a decimating FIR filter. Cascaded modulators can be constructed using the programs as building blocks. The simulation tools support the inclusion of nonideal effects caused by circuit imperfections, such as amplifier finite open-loop gain, incomplete settling and saturation as well as capacitor ratio mismatches. Two design examples are presented: one for a 1–1–1 cascade and the other for a single-stage fifth modulator.Computer Standards & Interfaces. 01/1998; 19:189-203.