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Why collector region is having more width than other two regions in BJT?
Its main function (as indicated by its name) is to collect the majority of charge carriers coming from the emitter and passing through the base. In most transistors, the collector region is made physically larger than the emitter region because it has to dissipate much greater power.
Why is Collector region wider than emitter region in BJT why is base region made so thin?
The collector region is the largest of all regions because it must dissipate more heat than the emitter or base regions. It is designed to be large because in order to dissipate all the heater, the extra surface area allows it to do so. The larger area ensures that it has more surface area to dissipate heat.
Why is the base region of a BJT narrow?
Because of this reason base is lightly doped. Thus, more current passing to the collector side or an output side. The base region is lightly doped so that width of the base is less. Collector region of a transistor is highly doped so collector region has more width than other two.
Can base current be greater than collector current?
A junction transistor is in fact 2 transistors: As a result, when both the forward and reverse transistor conduct, increasing base current leads to more conduction of the reverse transistor, and the collector current does not increase any more.
How to calculate collector current in BJT beta variations?
We saw in the previous article that BJT beta is both simple and complex: simple, because all you need to do to calculate collector current is multiply base current by beta; complex, because there are several betas to choose from.
How does base current increase and collector current decrease at?
Universität Paderborn. Hi, An increase in base current means more bias to the transistor which further means collector current will also increase but till the limiting value of the transistor parameters. However, if you try to push more current to the base, collector current would no more increase but the transistor may break down.
What causes variations in the forward current gain of a BJT?
This article looks at factors that can alter the functionality of a bipolar junction transistor (BJT) by causing variations in its forward current gain.
What are the characteristic curves of a BJT?
In the linear (or active) region the curves would ideally be horizontal straight lines, indicating that the collector behaves as a constant current source independent of the collector voltage, as illustrated in the hybrid-π model (i. C = βi. B).