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

Consider a Darlington amplifier. In the self bias network, the biasing

1.	Consider a Darlington amplifier. In the self bias network, the biasing resistances are 220k and 400 k . What can be the correct value of input resistance if hfe = 50 and emitter resistance = 10k .
A.	141 k
B.	15 M
C.	20 M
D.	200 k
Answer» B. 15 M