The two breakdown mechanisms in bipolar transistor are ______ and ______ .
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Considering the Hybrid-Pi Model in bipolar transistor, the gain is a function of the input signal frequency.( )
Because of the bandgap narrowing, the emitter injection efficiency and the current gain both decrease.( )
To avoid the current crowding effect, powder transistors are usually designed with narrow emitter widths and fabricated with an interdigitated design.( )
The bipolar transistor has three separately doped regions and two pn junctions. The three terminal connections are called the ______ , ______ , and ______ .