### Using Power Spectral Density (PSD) to Characterize Noise ...Explore further

2020-2-11u2002·u2002Hence, to calculate the total noise power at the output of a first-order low-pass filter, we can assume that the filter roll-off is abrupt and increase the filter bandwidth by a factor of 1.571. We often refer to (1.571times f_{-3dB}) as the noise equivalent bandwidth of a first-order filter that has a 3-dB bandwidth of (f_{-3dB}).The ...

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