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How do you calculate the noise figure of an amplifier?
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Explain the concept of noise figure in RF amplifiers.

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How does an LNA (Low Noise Amplifier) improve receiver sensitivity?

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How do you assess the impacts of transmission line noise?

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How does a parametric amplifier work in a low-noise amplifier?

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How does a lock-in amplifier extract weak signals from noise?
Answer : A lock-in amplifier is a powerful tool used to extract weak signals buried in noise by focusing on a specific frequency of the signal. It works based on a technique called *phase-sensitive ... signals are weak and mixed with noise, such as in optical, electrical, or even audio measurements....

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