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# Solution: Calculate the output noise voltage if the amplifier has a 5-dB NF

#### Problem Statement: Principles of Communications

Noise Problem Solving

A single stage amplifier has a 200 kHz bandwidth and a voltage gain of 100 at 290 K temperature. Assume that the external noise is negligible and that 1 mV signal is applied to the amplifier’s input. Calculate the output noise voltage if the amplifier has a 5-dB NF and the input noise is generated by a 2 kilo ohm resistor.

The output noise voltage is equal to 0.45 mV.

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