Question
Asked Feb 11, 2020
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Noise Figure of an amplifier is given as 10 dB. If the ambient temperature is 290 K, then what will be the equivalent noise temperature?

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Expert Answer

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Step 1

The noise figure (NF) and noise factor (F) of an amplifier are related by the following equation:

Electrical Engineering homework question answer, step 1, image 1

In this case, the values of the noise figure of the amplifier and the ambient temperature are given as

Electrical Engineering homework question answer, step 1, image 2

Step 2

Using equation (1), the value of the noise factor of the amplifier will be

Electrical Engineering homework question answer, step 2, image 1

Step 3

The equivalent noise temperature of the amplifier depends on the noise factor of the amplifier and it can be expressed as

Electrical Engineering homework question answer, step 3, image 1

 

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