1.

Consider a Darlington amplifier. In the self bias network, the biasing resistances are 220kΩ and 400 kΩ. What can be the correct value of input resistance if hfe=50 and emitter resistance = 10kΩ.

A. 141 kΩ
B. 15 mΩ
C. 20 mΩ
D. 200 kΩ
Answer» B. 15 mΩ


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