开关电容ΣΔ调制器的行为级建模  

Modeling Switched-Capacitor ΣΔ Modulator on Behavioral Level

作　　者：徐健[1] 戴庆元[1] 朱华平[1] 

机构地区：[1]上海交通大学微纳米研究院,上海200030

出　　处：《微处理机》2006年第3期4-6,10,共4页Microprocessors

摘　　要：在MATLAB的SIMULINK环境下,给出了一套开关电容ΣΔ调制器的时域行为级模型。该模型考虑了SCΣΔ调制器大部分的非线性效应,譬如:时钟抖动、热噪声以及运放的一些限制参数(转换速率、有限DC增益、有限带宽等)。最后给出二阶低通ΣΔ调制器的模拟结果。Present a set of blocks implemented in the MATLAB SIMULINK environment, whichallows designers to perform time - domain behavioral simulations of switched - capacitor sigma - delta modulators. The proposed set of models takes into account most of the SC ∑△ modulator nonidealities, such as sampling jitter, thermal noise, and operational amplifier parameters （finite dc gain, finite bandwidth, and slew rate）. The results obtained from a second - order low - pass SC ∑△ modulator was given.

关 键 词：SIMULINK ∑△调制器 模型 非线性 

分 类 号：TN4[电子电信—微电子学与固体电子学]