Electronics and Communication Engineering - Communication Systems - Discussion
Discussion Forum : Communication Systems - Section 2 (Q.No. 20)
20.
In a two stage cascade amplifier, each stage has a gain of 10 dB and noise figure of 10 dB. The overall noise factor is
Answer: Option
Explanation:
.
Discussion:
5 comments Page 1 of 1.
Manohar said:
1 decade ago
Can anyone explain the exact formula?
JAGADISH said:
1 decade ago
Overall noise figure F0 = F1+((F2-1)/G).
Gab Pesieto said:
10 years ago
Friis' Formula:
FT = F1+(F2-1)/A1+(F3-1)/A1A2 +. + (Fn-1)/A1A2. An-1.
Where FT = Overall Noise Figure.
F = Noise Figure.
A = Gain.
FT = F1+(F2-1)/A1+(F3-1)/A1A2 +. + (Fn-1)/A1A2. An-1.
Where FT = Overall Noise Figure.
F = Noise Figure.
A = Gain.
Vimalakar said:
6 years ago
Why F2 is also taken as 10?
Shameela said:
4 years ago
Given as the two stages have equal gain and noise figures.
F1 = F2.
A1 = A2.
F1 = F2.
A1 = A2.
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