What is the current gain of BJT in CE configuration?
Current gain in the common emitter circuit is obtained from the base and the collector circuit currents. Because a very small change in base current produces a large change in collector current, the current gain (β) is always greater than unity for the common-emitter circuit, a typical value is about 50.
Why does the collector current of a BJT in the active region increases with increasing collector voltage for a given base current?
Why does the collector current of a BJT in the active region increases with increasing collector voltage for a given base current. Answer:In the active region as the VCE voltage is increased the depletion layer width at the CB junction increases and the effective base width reduces.
When the collector current increases what does the current gain do?
The current gain is β = 1 / JC. Here, JC is collector current density. Hence, the value of current gain decreases or increases with respect to the collector current.
Why does the collector current increase with the increase in reverse bias at the collector junction?
So the charge carriers are electrons in the depletion region. The electric field established in this depletion region is directed from collector to base due to reverse bias. So the electron again tends to move towards the collector giving rise to collector current.
What is the relationship between collector current and base current?
Generally, the current that flows from the emitter to the collector or vice versa is the base current times the DC current gain (hFE). Note, however, that hFE varies with the collector-emitter voltage (VCE).
What is the most important facts about the collector current?
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.
When the collector current is increased in a transistor?
As the collector current is increased, the emitter releases more number of electrons. This causes more collisions of electrons at collector. This happens in a cycle and produces such a condition in which temperature is further more increased.