Lucy Liang edited Since_Johson_noise_occurs_because__.tex  over 8 years ago

Commit id: 9f4ea1fac1916f3234d21c53a8b997f914b5efbf

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Since Johson noise occurs because of the imbalance of charge in a conductor due to thermal fluctuations, it is not difficult to think about the physical reasons behind the relation of Johnson noise and the variables stated in Equation \ref{eq:Equatoin}. If $R$ is greater, there could be more charges that can contribute to the imbalance, increasing the noise. If equivalent bandwidth $\Delta f$ increases, the signal is averaged over a greater frequency range, less portion of the signal is being filtered out, increasing the final noise signal. If the temperature $T$  is increased, there is more thermal energy within each electron, allowing them to have a greater kinetic energy, which would result in greater fluctuations in the thermal noise, giving a higher fluctuating voltage reading.