Improved modeling of sigma-delta modulator non-idealities in SIMULINK

被引：14
|
作者：
Fornasari, A [1 ]
Malcovati, P [1 ]
Maloberti, F [1 ]
机构：
[1] Univ Pavia, Dept Elect Engn, I-27100 Pavia, Italy
来源：
2005 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS), VOLS 1-6, CONFERENCE PROCEEDINGS | 2005年
关键词：
D O I：
10.1109/ISCAS.2005.1466002
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The goal of this paper is to present an extension of the behavioral models, implemented in the Matlab/Simutink (TM) environment, previously presented in [1, 2] and available in [3]. This toolbox allows us to simulate at behavioral level most of the switched-capacitor (SC) sigma-delta (MA) modulator non-idealities, such as sampling jitter, kT/C noise and operational amplifier limitations (finite bandwidth, finite DC gain, slew rate and saturation). Although very effective in simulating wide-band, medium-resolution Sigma Delta converters the lack of a model for flicker noise and multi-bit quantizers makes this toolbox less attractive for simulating narrow band high resolution converters. The proposed extension not only fixes this limitation, but introduces a predictive model of the effect of capacitor mismatch in the internal multi-bit D/A converter.
引用
收藏
页码：5982 / 5985
页数：4
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