संधि ट्रांजिस्टर क्या होता है? आवश्यकत चित्र बनाकर PNP ट्रांजिस्टर की क्रिया विधि समझाइए।
Answers
A transistor consist of 2 pn junction formation by sanwaching of other p type, n type semiconductor between a pair of opposite side
working-
the pnp transistor has 2 pn jn namely base to emitter jn and vollector amd collector to base jn.
the emitter base jnis forward biased only if the emitter to bsse voltage Veb exceed ths barriee pitential which is 0.7v fie silicon ans ger. transistor.
the fieeard bias on the emitter bade jn causes majority carrier to flow towards the base regii. this constitutes the emitter current Ie.
as the holes reach the base region after crissing the eb jn, they tend to combind eith msjoeity carrier .however the most the holes do not combine with the e in the base. thus most holes diffuse to the collector region due to holes injected from thd emitter region.
Ie=Ib+Ic
