Madeline Horn edited subsection_Johnson_Noise_Johnson_noise__.tex  over 8 years ago

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\subsection{Johnson Noise:}  Johnson noise is the electric noise generated from small thermal fluctuations of the electrons through an electrical conductor (\cite{PhysRev.32.97}). \cite{PhysRev.32.97}.  Thermal noise arises because the electrons create a random, and measurable, fluctuation in voltage. Johnson noise is also given the name "Nygquist noise" because it was correctly predicted and explained by H. Nyquist, but Johnson was the first to measure it. As published in \cite{PhysRev.32.110}, the root mean square of ac voltage when no current is flowing is as follows: