Communication System Question 8
Question: Assume that the silicon diode in the circuit requires a minimum current of 1 m A to be above the knee point (0.7 V) of I-V characteristics. Also assume that the voltage across the diode is independent of current above the knee point. If $ V _{B} $ = 5 V, then the maximum value of R so that the voltage is above the knee point is
Options:
A) $ 4.3k\Omega $
B) $ 2,k\Omega $
C) $ 1,\Omega $
D) 0
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ R=\frac{(5-0.7)V}{1\times {{10}^{-3}}}=\frac{4.3}{{{10}^{-3}}}\Omega =4.3\times 10^{3}\Omega $
$ =4.3k\Omega $
BETA
