Is BJT unipolar or bipolar Why?

1 Answer

Answer :

Bipolar Junction Transistor (BJT) is a bipolar device because current is carried by both holes and electrons hence it is called bipolar.

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Last Answer : BJT is called bipolar junction transistor because in BJT current conduction takes place due to majority as well as minority charge carriers.

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Description : Why BJT is a current control device?

Last Answer : BJT have three terminal emitter, base and collector. The collector current is the output current. The collector current (Ic) is controlled by base current hence BJT is called current controlled device.

Last Answer : Yes IGBT is costlier than BJT and MOSFET.

Last Answer : Yes BJT have internal capacitances.

Last Answer : BJT act as switch in saturation and  cutoff region ( ON state in saturation region and OFF state in cut-off region )

Last Answer : In cut-off region of BJT both the emitter-base junction and collector-base junction are reverse biased.

Last Answer : Active region of BJT act as amplifier.

Last Answer : Active , Saturation , Cut-off region of operations in BJT.

Last Answer : Yes BJT have second breakdown problem.

Last Answer : BJT is current controlled device.

Last Answer : BJT have three terminals Base, emitter and collector.

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Last Answer : DC coupled drive circuit with unipolar output: The figure shows the circuit and waveforms

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Last Answer : Because the output (collector) current can be controlled by base current.

Description : why the bjt is known as current controlled device and fet is known as voltage controlled device ?

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