一种改进的开关电容Σ-Δ调制器的行为模型  

An Improved Behavioral Model of Switched-Capacitor Σ-ΔModulator

作　　者：郝志刚[1,2] 杨海钢[1] 张翀[1,2] 吴其松[1,2] 尹韬[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《微电子学》2010年第1期108-113,共6页Microelectronics

基　　金：国家高技术研究发展(863)计划基金资助项目(2007AA04Z349)

摘　　要：提出了一个开关电容Σ-Δ调制器的行为级模型。该模型不仅考虑了通常非理想特性,包括取样的抖动、kT/C噪声、有限带宽、有限摆率、电荷注入,还考虑了对系统性也有很大影响的开关的非零、非线性导通电阻。提出的模型在Simulink中实现,并与Cadence SPICE的电路级仿真进行了比较验证,二者具有较好的一致性。A non-ideal behavioral model of switched-capacitor （SC） ∑-△ modulator implemented in Simulink was presented. In this model, not only non-idealities, such as sampling jitter, kT/C noise, finite bandwidth （BW）, finite slew rate （SR）, charge injection, were taken into consideration, but also nonzero and nonlinear on-resistance of switches, which are equally important to the system performance, yet usually neglected due to modeling difficulty, were included. The proposed model, which was implemented in Simulink, was validated by comparing with Cadence SPICE simulation at transistor-level. Results indicated a good consistency.

关 键 词：∑-△调制器 开关电容 行为模型 非理想特性 

分 类 号：TN761[电子电信—电路与系统]