Single heterojunction bipolar transistor, Double heterojunction bipolar transistor, Non-uniform material, Early effect, Emitter bias dependence, High-level injection, Base, emitter and collector ...
A SiGe heterojunction bipolar transistor uses a silicon-germanium alloy layer as the active base material. The introduction of Ge causes a reduction of the bandgap and thus an increase in the ...
A tremendous development has taken place since then and the heterojunction bipolar transistor (HBT) has become an indispensable microwave device. At the time of this writing, three types of HBT ...
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