bipolar junction transistors

Thread Starter


Joined Nov 3, 2007
1- How many regions of operation does a bipolar junction transistor have and which region has to dissipate the most heat
2- In a biopolar junction transistor, collector current is controlled by what? a-collector voltage b-base current c-collector resistance or all of the above


Joined Feb 10, 2007
3 regions of operation : 1) Saturation 2) Cut-off 3) Active
It basically acts as a switch in first 2 regions of operation and an Amplifying action takes place in the third region.It is a current controlled device as a base current (Ib)controls the collector current(Ic) in case of CE (Common Emitter )configuration. search wikipedia for general information.