Question 6 An amplifier of power gain 20 dB has an input consisting of 100uW signal power and 1uW noise power. If the amplifier contributes an additional 100uW of noise, determine a) The output signal to noise ratio b) The noise factor and c) The noise figure
Added by Christopher C.
Close
Step 1
Given that the input signal power is 100 μW and the input noise power is 1 μW, and the amplifier contributes an additional 100 μW of noise, the total input noise power is 1 μW + 100 μW = 101 μW. The power gain of the amplifier is 20 dB, which can be converted Show more…
Show all steps
Your feedback will help us improve your experience
Adi S and 69 other Physics 102 Electricity and Magnetism educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
In audio and communications systems, the $\textbf{gain}$, $\beta$, in decibels is defined for an amplifier as $$\beta = 10 \space log \bigg(\frac {P_{out}}{ P_{in}}\bigg),$$ where $P_{in}$ is the power input to the system and $P_{out}$ is the power output. ($a$) A particular amplifier puts out 135 W of power for an input of 1.0mW. What is its gain in dB? ($b$) If a signal-to-noise ratio of 93 dB is specified, what is the
'5.A mixer stage has a noise figure of 25 dB, and this is preceded by an amplifier that has noise figure of 10 dB and an available power gain of 20 dB. Determine the overall noise figure referred to the input:'
Madhur L.
Recommended Textbooks
University Physics with Modern Physics
Physics: Principles with Applications
Fundamentals of Physics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD