异质结双极晶体管的直流和高频模型

T. Daniel, R. Tayrani
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引用次数: 2

摘要

本文提出了一个精确预测AlGaAs-GaAs异质结双极晶体管(HBTs)直流、小信号和噪声特性的详细模型。直流模型的特点是在基极-发射极结处的热离子发射和隧道效应,以及各种复合电流的计算,这些都是总基极电流的组成部分。我们引入了一组新的噪声方程,该方程考虑了本征噪声源的相关性和频率依赖性。与SPICE噪声模型相比,该模型在预测基于HBT的电路的小信号和大信号噪声方面有了进一步的改进。这些模型可以很容易地实现到任何SPICE或谐波平衡模拟器。我们的研究结果使用不同的代工厂的设备进行验证。
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DC and high frequency models for heterojunction bipolar transistors
This paper presents a detailed model which accurately predicts DC, small-signal and noise characteristics of AlGaAs-GaAs heterojunction bipolar transistors (HBTs). The features to the DC model are thermionic emission and tunneling effects at the base-emitter junction, calculation of various recombination currents, which contribute to the total base current. We introduce a new set of noise equations, which takes into account the correlation and frequency dependencies of the intrinsic noise sources. Compared to the SPICE noise model, this model provides further improvement in predicting small signal and large signal noise for HBT based circuits. These models can be easily implemented into any SPICE or harmonic balance simulators. The results of our study are validated using devices from different foundries.
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