Squirtle
Junior Member level 2
![Junior Member level 2](/styles/images/ranks/clevel2.gif)
Hello guys,
I don't understand something about SNR. In signal chain, we know that SNR never increases, in every step it slightly decreases and in every component signal passing through, noise floor get closer to the signal. We use amplifier to amplify coming weak signal but noise signal also increases in same amount. So, why do we use amplifier if it does not have positive affect on SNR.
I don't understand something about SNR. In signal chain, we know that SNR never increases, in every step it slightly decreases and in every component signal passing through, noise floor get closer to the signal. We use amplifier to amplify coming weak signal but noise signal also increases in same amount. So, why do we use amplifier if it does not have positive affect on SNR.