State the need of biasing of BJT.

2 Answers

Answer :

Need of Biasing of BJT: The purpose of dc biasing of BJT is to obtain a certain dc collector current at a certain dc collector voltage i.e. IC and VCE (Q-point). The selected Q point is stabilized against variation in temperature.

Answer :

Need of biasing:  The basic need of transistor biasing is to keep the base-emitter (B-E) junction properly forward biased and the collector-emitter (C-E) junction properly reverse biased during the application of A.C. signal.  This type of transistor biasing is necessary for normal and proper operation of transistor to be used for amplification. 

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Last Answer : The proper flow of zero signal collector current and the maintenance of the proper collector emmiter voltage during passage of single called as transistor biasing

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Last Answer : On state losses in power BJT: Transistor have four types of losses one is turn on state losses second is turn off state losses third is turn on switching losses and fourth is turn ... ON = VCE sat x IC With increasing collector current collector to emitter saturation voltage increases.

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Last Answer : Biasing of transistor is the process that makes the base emitter junction of transistor always forward biased and collector junction reverse biased for achieving the faithful amplification .

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Last Answer : The beta value in power BJT is 5 to 10.

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Last Answer :  If the base current of a BJT is 250 µA and emitter current is 15 mA, then the common base current gain will be 0.98 

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Last Answer : open emitter BJT drive circuit:

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Last Answer : Yes BJT have internal capacitances.

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

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

Last Answer : Yes BJT have second breakdown problem.

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

Last Answer : Because it has a higher switching frequency and heat tolerance.

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Last Answer : When Q-point is at cut off region means it is just above the horizontal axis VCE

Last Answer : Beta is the current gain which is the ratio of collector current to base current.

Last Answer : BJT control the flow of electron so it is a active device.

Last Answer : No, BJT is a current controlled device .

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