In which region the collector current is proportional to the base current?
Explanation: The collector current is directly proportional to the base current in the saturation region of the BJT.
Why collector current depends on base current?
The base current in the BJT is due to the recombination of holes and electrons. 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. Ic=BetaxIb, which shows that Ib is directly proportional to Ic.
How do transistors increase current?
During the negative alternation of the input signal, the transistor current increases because the input voltage aids the forward bias. The output for the negative alternation of the input is a positive alternation of voltage that is larger than the input but has the same sine wave characteristics.
How do you control base current?
(2) The base current is further reduced by making the base junction thinner while volumetrically completely enclosing the emitter. This increases the emitter to collector current at the same base current. Or it decreases the base current when emitter-to-collector current is kept constant.
When does collector current become independent of base voltage?
Transistor never operated below this voltage. After voltage (Vcb) increase above 1-2 V, you can see collector current (Ic ) becomes a straight horizontal line. That mean collector current becomes constant above 1-2 V. It means collector current is independent of collector base voltages and depends upon the emitter current only.
How does the collector current direction remain the same?
The collector current direction remains same in both active and saturation state where the former puts the base collector junction reverse biased and the latter puts the base collector junction forward biased. How is it possible?
What are the output characteristics of a collector?
Output characteristics is curve between collector current (Ic ) and collector base voltage ( Vcb ) at constant emitter current (Ie ). Here collector current is shown on y-axis and collector base voltage is shown on the x-axis.
What is the current amplification factor in a transistor?
The current amplification factor is the ratio of change in output current to change in input current. For common base configuration transistor connection output current is collector current ( Ic) and input current is emitter current ( Ie).