Why is it called saturation region?
Saturation, as the name might imply, is where the base current has increased well beyond the point that the emitter-base junction is forward biased. In other words, the small base current can be made to control a much larger current between the collector and emitter.
What is saturation region for BJT?
The second region is called “saturation”. This is where the base current has increased well beyond the point that the emitter-base junction is forward biased. In fact, the base current has increased beyond the point where it can cause the collector current flow to increase.
What is saturation region in output characteristics?
The region to the left of the ordinate VCB = 0, and above the IE = 0, characteristic in which both emitter and collector junction are forward biased, is called saturation region. When collector diode is forward biased, there is large change in collector current with small changes in collector voltage.
What separates the three regions in a BJT?
Construction of Bipolar Junction Transistor. BJT is a semiconductor device that is constructed with 3 doped semiconductor Regions i.e. Base, Collector & Emitter separated by 2 p-n Junctions . Bipolar transistors are manufactured in two types, PNP and NPN, and are available as separate components, usually in large quantities. The prime use or function of this type of transistor is to amplify current.
How does BJT work in saturation mode?
Saturation refers to a region of operation where maximum collector current flows and the BJT acts like a closed switch from collector to emitter . In this mode the BC junction forward biases and maximum current flows. The collector current cannot increase any more, even with an increase in base current.
What are the three operating region of BJT?
The operating of BJT can be done in three different regions like active, saturation, and cut-off. In this region, one junction is connected in a forward bias whereas the other one is connected in reverse bias.
Why does BJT is called bipolar?
It’s called bipolar because the conduction takes place due to both electrons as well as holes. BJT’s are used in a discrete circuit designed due to availability of many types, and obviously because of its high transconductance and output resistance which is better than MOSFET.