An analysis of a unit cell of a focal plane array (FPA) read out integrated circuit for very dense low flux applications. In this analysis, the self capacitance of a velocity saturated quantum well detector is operates like a direct injection circuit. The signal processing used is a classical, ramp, and sample process combined with a non-destructive read switched capacitor filter.
Robert James Martin,
"Nondestructive read filter for low-flux ROICs", Proc. SPIE 3379, Infrared Detectors and Focal Plane Arrays V, (22 July 1998); doi: 10.1117/12.317592; https://doi.org/10.1117/12.317592