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The heterojunction bipolar transistor (HBT) is a type of bipolar junction transistor (BJT) which uses differing semiconductor materials for the emitter and base regions, creating a heterojunction. The HBT improves on the BJT in that it can handle signals of very high frequencies, up to several hundred GHz. It is commonly used in modern ultrafast circuits, mostly radio-frequency (RF) systems, and in applications requiring a high power efficiency, such as RF power amplifiers in cellular phones. The idea of employing a heterojunction is as old as the conventional BJT, dating back to a patent from 1951.

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What has the author Stephen M Young written?

Stephen M. Young has written: 'A superlattice emitter structure for a heterojunction bipolar transistor'


What has the author Peter Ashburn written?

Peter Ashburn has written: 'Sige Heterojunction Bipolar Transistors'


Why high noise in bipolar junction transistor?

In the case of Bipolar Junction Transistor current conduction is due to both holes and electrons. That's why noise is high in Bipolar Junction Transistor


Why ordinary transistor is known as bipolar junction transistor?

Transistor is known as bipolar junction becoz it has 2 pole. Input is given to the 2 junction and output is taken from to junction


What has the author Mark Gerard Schumacher written?

Mark Gerard Schumacher has written: 'VLSI compatible SiGe heterojunction bipolar transistors'


Is junction transistor and bipolar junction transistor are same?

Yes, the are different names for the same thing.


What is the difference between a bipolar transistor and a field effect transistor?

A bipolar transistor uses both majority and minority charge carriers for conduction, while a field effect transistor primarily relies on majority charge carriers. Field effect transistors have a higher input impedance compared to bipolar transistors. Additionally, bipolar transistors are current-operated devices, while field effect transistors are voltage-operated devices.


Which terminal of a bipolar transistor has the current direction arrow?

The emitter


Which bipolar transistor circuit carries the lowest current?

Drain is the answer


Why is an ordinary transistor known as a bipolar transistor?

because once saturated it will conduct current both way raja TOQEER (Pakistan)


What BJT stand for?

Unless it is some leet speak term I am not aware of, BJTstands for Bipolar Junction Transistor or (less common) Business Japanese Proficiency Test.


How do you test the bipolar junction transistor?

through the used of multi-tester

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