Electronic Devices and Circuits

Q1: Which one of the following bipolar transistors has the highest current gain bandwidth Product (fr) for similar geometry?

A NPN germanium transistor

B NPN silicon transistor

C PNP germanium transistor

D PNP silicon transistor

ANS:B - NPN silicon transistor

Answer should be A because the current gain is high for germanium relating to mobility of Ge higher than si for constant bandwidth.



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