What is the most important facts about the collector current in BJT?

What is the most important facts about the collector current in BJT?

What is the most important fact about the collector current? It is measured in milliampere. It equals the base current divided by the current gain. It is small.

Why there must be some base current in BJT?

The base current in the BJT is due to the recombination of holes and electrons. To neutralize the p region an electron leaves the p region. If we take it the other way round, the larger the base current the greater is the recombination, so the collector current should reduce, but Beta Ic/Ib.

Which is one important thing transistors do?

One of the most important things that a transistor can do is amplifying a weak signal under linear operation. Transistor to work as an amplifier the emitter-base junction must be forward biased and the collector-base junction must be reverse biased.

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.

Why does a constant VBE give a constant collector current?

Constant VBE gives constant IB, constant IE, and constant IC. This constant emitter current, multiplied by a constant α ratio, gives a constant collector current through R load if enough battery voltage is available to keep the transistor in its active mode for any change in R load ‘s resistance.

Which is the most important characteristic of a BJT?

In order to distinguish these regimes we have to look at the i-v characteristics of the device. The most important characteristic of the BJT is the plot of the collector current, IC, versus the collector-emitter voltage, VCE, for various values of the base current, IBas shown on the circuit of Figure 6.

Can you change the collector current of a transistor?

You definitely can’t change the physical dimensions and doping concentrations of a purchased transistor, but you still can exert some influence over the value of the transistor’s beta, because beta is highly dependent on collector current (I C ).