共振隧穿二极管串联电阻测量方法的比较与分析

Comparison and Analysis on Measurement Method of Resonant Tunneling Diode Series Resistance

介绍了采用3种测量GaAs基RTD器件的串联电阻参数的方法:温度特性法、外加电阻法和电桥法.研究发现,不同的测试手段,得到的串联电阻值存在较大差异.对每种测量方法的原理进行了比较分析,由于3种方法分别针对RTD的不同电流区域进行测量,因而串联电阻会随着测量区域的改变而变化,导致测量结果不一致.对于RTD的不同用途要采用对应的测试方法,这为RTD在电路方面的应用奠定了基础.

This paper introduces three methods through which series resistance of GaAs-RTD device can be measured. The three methods are temperature method,additional resistance method, and electric bridge method. The values of series resistance measured though the three methods are diverse. Comparing the principle of three measurement methods, the reason is that the series resistance varies with different current fields ,while the three measurement methods focus on three kinds of current fields respectively. It establishes the foundation of application in different circuits by choosing proper measurement method.