Pnc po,B F2 no,C MO, E
Solution
BJT in active mode means EB Junction is forward biased and CB juction is reverse biased.
Since EBJ is forward biased, the depletion width is smaller thean CBJ depletion width (which is
reverse biased). Let us consider the electrons injected from the emitter into the base. These
electrons will be minority carrier in the p-type base regrion. Because the base is usually very
thin, in the steady state the excess minority carrier concentration in the base will have an almost
straight-line profile. This tapered minority-carrier concentration profile causes the electrons
injected into the base to diffuse though the base region toward the collector. The Collector-Base
juction is reverse biased so the minority carrier concentration profile can be constant in collector..
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Pnc po,B F2 no,C MO, E Solution BJT in active mode means EB Junc.pdf
1. Pnc po,B F2 no,C MO, E
Solution
BJT in active mode means EB Junction is forward biased and CB juction is reverse biased.
Since EBJ is forward biased, the depletion width is smaller thean CBJ depletion width (which is
reverse biased). Let us consider the electrons injected from the emitter into the base. These
electrons will be minority carrier in the p-type base regrion. Because the base is usually very
thin, in the steady state the excess minority carrier concentration in the base will have an almost
straight-line profile. This tapered minority-carrier concentration profile causes the electrons
injected into the base to diffuse though the base region toward the collector. The Collector-Base
juction is reverse biased so the minority carrier concentration profile can be constant in collector.
