考虑衬底涡旋电流的CMOS射频电路电感元件的快速提取算法及实现  

Efficient Impedance Calculation for RF CMOS Spiral Inductors Incorporating Eddy Currents Effect

作　　者：高巍[1] 潘桃[2] 刘佳扬[3] 叶佐昌[1] 余志平[1] 

机构地区：[1]清华大学微电子学研究所,北京100084 [2]麻省理工学院,美国剑桥021394307 [3]清华大学电子工程系,北京100084

出　　处：《电子学报》2006年第8期1361-1366,共6页Acta Electronica Sinica

基　　金：国家863高科技研究发展计划(No.2004AA1Z11050)

摘　　要：本文描述了一个采用复镜像方法来解析计算CMOS射频电路中衬底涡旋电流对螺旋电感元件的影响.其基本思路是将衬底里分布着的涡旋电流等效为电感金属绕组的一个镜像,但是这个镜像所处的位置是一个复数.通过把计算出的部分电感和部分电容矩阵组装成一个PEEC(部分元件等效电路)的办法,能够进一步算出螺旋电感的交流小信号参数.基于该算法实现的程序(称为SCAPE)的正确性已经通过大量的例子测试,并跟一些广泛使用的软件(如UC Berkeley的ASITIC和Agilent的ADS M om entum)进行了比较,结果证明了SCAPE具有精度高、运算速度快的优势.An algorithm using the complex imaging method is presented in this paper to calculate the effective inductances of RF CMOS spiral inductors, with the effect of eddy currents inside the conductive substrate taken into consideration. The basic idea is to view the distributed eddy currents as a lumped image of the source current flowing in the inductor＇s windings, except that the position of the image is a complex number. After constructing a PEEC（ partial equivalent element circuit） with the partial capacitance and inductance matrices extracted,the AC port-parameters of the inductor can then be computed. The accuracy of the completed program based on the above algorithm, called SCAPE, has been verified through a number of examples and comparisons with popular softwares such as ASITIC from UC Berkeley and Momentum in Agilent＇s ADS. There is an apparent speed advantage with our program.

关 键 词：射频集成电路 螺旋电感 涡旋电流 复镜像法 电磁场解法器 

分 类 号：TP211.51[自动化与计算机技术—检测技术与自动化装置]