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Q. |
If a frequency multiplier has a multiplication factor of 10, then the increase in noise level due to frequency multiplication is: |
A. | 10 db |
B. | 20 db |
C. | 25 db |
D. | 15 db |
Answer» B. 20 db | |
Explanation: for a frequency multiplier, the increase in noise power is given by 20 log n, where n is the multiplication factor of the multiplier. substituting in the below equation, increase in noise level is 20 db. |
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