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Influence of the minority carrier extracted by the base electrode on current gain of bipolar power transistors

机译:基极提取的少数载流子对双极型功率晶体管电流增益的影响

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摘要

Bipolar power transistors (BPTs) are widely used in various kinds of high-voltage and medium-power applications due to their low on-state voltage drop and high current capability. In this paper, the influence of minority carrier extracted by the base electrode on the current gain of BPTs is presented first and studied in detail. It is suggested that the minority carrier extracted by the base electrode is responsible for the current gain change. Based upon this theory, a structure with a local heavily-doped base (LHDB) to increase the current gain is proposed and investigated. The increase of the current gain can be controlled by the doping of the LHDB and the location of the LHDB relative to the emitter region. The analytical results show a good agreement with the numerical simulation and experiment results.
机译:双极型功率晶体管(BPT)由于其低的导通状态压降和高的电流能力而广泛用于各种高压和中功率应用中。本文首先介绍并详细研究了基极提取的少数载流子对BPTs电流增益的影响。建议由基极提取的少数载流子负责电流增益的变化。基于该理论,提出并研究了具有局部重掺杂基极(LHDB)来增加电流增益的结构。电流增益的增加可以通过LHDB的掺杂和LHDB相对于发射极区域的位置来控制。分析结果与数值模拟和实验结果吻合良好。

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