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Madeline Horn added subsection_Johnson_Noise_Johnson_noise__.tex
over 8 years ago
Commit id: 6c3783a1e575340ac46b1ff83205e49bcafbc72a
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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. 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.
\begin{equation}
\label{eq:NyquistPredictionForJohnsonNoise}
V_{\textrm{mean square ac voltage} $ = (4 R \Delta f) k_B T$ }
\end{equation}
