Distributed Small-Signal Equivalent Circuit Model and Parameter Extraction for siGe HBT

被引：5

作者：

Sun, Yabin ^{[1
]}

Liu, Ziyu ^{[2
]}

Li, Xiaojin ^{[1
]}

Shi, Yanling ^{[1
]}

机构：

[1] East China Normal Univ, Dept Elect Engn, Shanghai Key Lab Multidimens Informat Proc, Shanghai 200241, Peoples R China

[2] Fudan Univ, Sch Microelect, State Key Lab ASIC & Syst, Shanghai 200433, Peoples R China

来源：

IEEE ACCESS | 2019年 / 7卷

基金：

中国国家自然科学基金;

关键词：

Device modeling; small-signal model; parameter extraction; SiGe HBT; transmission line; rational function fitting; RESISTANCE;

D O I：

10.1109/ACCESS.2018.2879972

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, we present an improved high frequency small-signal distributed model for SiGe HBTs under forward-active mode based on the transmission line theory. The distributed nature of the transistor structure is taken into account in the proposed model. The single SiGe HBT is considered to be a cascade of many infinitesimal transistors, connected with the intrinsic base resistance. The closed-form solutions of admittance parameters for the distributed model are derived by solving the transmission line equation. With reasonable approximation and simplification, the model parameters are then directly extracted based on the nonlinear rational function fitting. The new improved distributed model and parameter extraction technique are validated with a 1 x 1.2 x 30 mu m(2) SiGe HBT from 100 MHz to 20.89 GHz. The simulated S-parameters in the proposed transmission line model are in close agreement with the measured data, and the frequency characteristics of the transistors are well predicted.

引用

页码：5865 / 5873

页数：9

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