A reset noise reduction method using a feedback amplifier that results in an 80% noise reduction in 3-transistor (3-T) pixels is presented. 3-T pixels are useful for non-visible imaging applications because they have fewer post-processing issues than 4-T pixels and do not require charge transfer. They suffer from reset noise because correlated-double sampling cannot be realized without additional memory. Analysis of the experimental power spectral density indicates potential for further noise cancellation in future devices.
Kaitlin M. Anagnost, Xin Yue, Eric R. Fossum, "Reset noise reduction method in 3-T pixels" in Electronic Imaging, 2023, pp 344-1 - 344-5, https://doi.org/10.2352/EI.2023.35.6.ISS-344