Question
The power of an RF signal at the output of a receive amplifier is $1 \mu \mathrm{W}$ and the noise power at the output is $1 \mathrm{nW}$. What is the output signal-tonoise ratio in $\mathrm{dB}$ ?
Step 1
SNR is the ratio of the signal power to the noise power. In this case, the signal power is 1 μW (1 x 10^-6 W) and the noise power is 1 nW (1 x 10^-9 W). SNR (linear) = Signal Power / Noise Power SNR (linear) = (1 x 10^-6 W) / (1 x 10^-9 W) SNR (linear) = Show more…
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