Loading....
Coupon Accepted Successfully!

 

BJT-Bipolar Junction Transistor

Transistors are basic building blocks of electronics used for amplifiers and switching signals.

 

The basic definition of BJT is “It is a three terminal device whose output voltage/current or power is controlled by its input current.”

It is a current-controlled current source device.


In common base configuration, 
the ratio of output current to the input current is called Current Gain (α) or Current Amplification Factor of a transistor.


Current Gain
 is defined as “The ratio of change in collector current to the change in emitter current at constant collector - base voltage.
 

516.png at 521.pngconstant
 

Collector current 526.png 
 

Base amplification factor (β):-”It is defined as the ratio of change in collector current to the change in base current.”

531.png 

Collector Current 536.png


Relation between
α and β

541.png 


Current Amplification Factor: 
546.png 


Relation Between
 γ and α 551.png


Collector current:
 556.png
 

Comparison of Transistor Connections
 

561.png 





Test Your Skills Now!
Take a Quiz now
Reviewer Name