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Bandwidth = 8Mhz = B
Input resistance = 100 ohms = R
Temperature = 37 degree C = 310K = T
P = kTB, where K = Boltzmann constant = 1.38 × 10–23
V = sqrt(4*KTBR)
Substituting the values, V = 3.7uV
and P = V2/4R = 3.4224 x 10-11 milliwatts = -104.7 dBm
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