Av = 34dB, NF = 12dB, Vi = 40mV, Ni = 1mV
I already solved this problem. The professor wanted the Vo and So in voltage. I got So = 2V and No = 200mV. I calculated the S/N = 20dB, which I know if correct. If I convert the So and No to dab I get So = 6dB and No = -14dB. The only way to get 20dB from that is to: 6dB - (-14dB), but I don't know why..... First is that right? If so why subtract the noise from the signal?
I already solved this problem. The professor wanted the Vo and So in voltage. I got So = 2V and No = 200mV. I calculated the S/N = 20dB, which I know if correct. If I convert the So and No to dab I get So = 6dB and No = -14dB. The only way to get 20dB from that is to: 6dB - (-14dB), but I don't know why..... First is that right? If so why subtract the noise from the signal?