标题: 单回路积分三角类比数位转换器之积分器充电杂讯与谐波功率模型
Analytical Settling Noise and Distortion Power Models of Sigma-Delta ADCs
作者: 黄俊杰
陈福川
电控工程研究所
关键字: 积分三角转换器;积分充电杂讯;积分充电谐波;交换式电容;Sigma-delta modulation;settling noise;settling distortion;switched-capacitor
公开日期: 2008
摘要: 交换式电容积分器是积分三角转换器中基本的建构成份。其电容不完全的充放电转换特性(积分器充放电问题)为积分三角转换器中一个主要影响输出误差的来源。而因为积分器充放电问题的高复杂性,相关的误差和失真的解析模型实际上是不存在的。在此篇论文中,我们的目的在于经由非线性拟合方法和输出端频谱预测技术来分析积分器充放电问题。由上法,积分器充放电问题误差和失真的封闭解可获得,且可使用积分三角转换器中的系统参数来组成函数以呈献出来。同时我们使用了行为层的模拟以及HSPICE电路的模拟来验证此解析模型的正确性,验证结果显示出我们的解析模型是足够精确的。
Switch-capacitor (SC) integrator is the basic building component for sigma-delta ( ) modulators and its incomplete charge transfer (settling problem) constitutes one of the dominant error sources in modulators. Due to the complexity of settling problem, analytic models for related noises and distortions are virtually non-existent. In this paper, we aim to analyze the settling problems by employing nonlinear fitting methods and output spectrum prediction techniques. Closed forms of settling error and settling distortion models are obtained, and are represented as functions of modulator system parameters. Both behavior simulations and HSPICE circuits are employed to verify these analytical models, and the results show that our analytical models are sufficiently accurate.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT009512545
http://hdl.handle.net/11536/38251
显示于类别:Thesis


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