For operation in the normal active mode for a BJT, which of the following conditions is true?
Right Answer is:
B-E junction should be forward biased and the C-B junction should be reversed biased.
The BJT transistor has two junctions, namely emitter-base (EB) and collector–base (CB), and each of these junctions can be either forward or reverse biased, we can have four different modes of operation for the bipolar transistor. They are:
⇒ Normal active mode:- The emitter-base (B-E) junction is forward biased and the CB junction is reverse biased.
⇒ Saturation mode:- Both EB and CB junctions are forward biased.
⇒ Inverse active mode:- The emitter-base junction is reverse biased and the CB junction is forward biased.
⇒ Cut-off mode:- Both EB and CB junctions are reverse biased.