Noise source: I1 | ||
---|---|---|
Spectral density: | $S_{i}$ | $\,\mathrm{\left[\frac{A^2}{Hz}\right]}$ |
Detector-referred: | $R_{s}^{2} S_{i}$ | $\,\mathrm{\left[\frac{V^2}{Hz}\right]}$ |
Source-referred: | $R_{s}^{2} S_{i}$ | $\,\mathrm{\left[\frac{V^2}{Hz}\right]}$ | Noise source: V1 |
Spectral density: | $4 R_{s} T k$ | $\,\mathrm{\left[\frac{V^2}{Hz}\right]}$ |
Detector-referred: | $4 R_{s} T k$ | $\,\mathrm{\left[\frac{V^2}{Hz}\right]}$ |
Source-referred: | $4 R_{s} T k$ | $\,\mathrm{\left[\frac{V^2}{Hz}\right]}$ | Noise source: V2 |
Spectral density: | $S_{v}$ | $\,\mathrm{\left[\frac{V^2}{Hz}\right]}$ |
Detector-referred: | $S_{v}$ | $\,\mathrm{\left[\frac{V^2}{Hz}\right]}$ |
Source-referred: | $S_{v}$ | $\,\mathrm{\left[\frac{V^2}{Hz}\right]}$ |
The spectral density of the total output noise can be written as:
\begin{equation} S_{out}=R_{s}^{2} S_{i} + 4 R_{s} T k + S_{v}\,\left[ \mathrm{\frac{V^{2}}{Hz}}\right] \end{equation}The noise figure is obtained as:
\begin{equation} F=4.343 \log{\left(\frac{0.25 R_{s} S_{i}}{T k} + 1 + \frac{0.25 S_{v}}{R_{s} T k} \right)}\,\left[ \mathrm{dB}\right] \end{equation}Go to Amplifier-noise-figure_index
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Last project update: 2023-06-12 11:49:08