Noise induced by the readout electronics, typically dominated by the noise on the floating diffusion amplifier and/or the analog-to-digital converter. It typically increases with clocking speed or frame readout speed. This noise is the result of the statistical variation or “error” that occurs when the amplifier attempts to reset itself to zero before the next image.
To make SNR data even more approachable, a useful variation is to look at relative SNR (rSNR), where all data is normalized to an imaginary “perfect camera” that has 100 % QE and zero noise.
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