Topic: Communication Systems
If each stage has a gain of 10 dB, and noise figure of 10 dB, then the overall noise figure of a two-stage cascade amplifier will be
- A. 10
- B. 1.09
- C. 1.0
- D. 10.9
Answer: D. 10.9
Explanation: $F=F_{1}+\frac{F_{1}-1}{G_{1}}=10+\frac{10-1}{10}=10+0.9=10.9$