Reset noise reduction method in 3-T pixels

Abstract

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.