Electronic Circuits/The BJT Modes

Depending on the different bias conditions on the emitter-base Junction(EBJ) and the collector-base junction(CBJ), the following modes of operation of BJT are obtained:

Mode	EB junction	CB junction
Cut-off	Reversed	Reversed
Forward -Active	Forward	Reversed
Reverse -Active	Reversed	Forward
Saturation	Forward	Forward

It is important to note that these rules apply for the PNP transistor as well. We don't care how the diode gets forward biased, merely that it is forward biased.