Hybrid infrared focal plane signal and noise model

A signal and noise model is presented for an infrared sensor with an advanc ed hybrid focal plane that uses a CMOS readout integrated circuit (ROIC), P art of the motivation for this work is to present a clear foundation for so me of the well-known practical and useful rules that apply to infrared sens ors in use today, The model shows explicitly how a correlated double sample r (CDS) eliminates kTC noise, explains the interesting dependence of output 1/f noise on integration and epoch times, and is generic enough to treat a large class of ROIC preamps, A sensor with a direct injection readout is t reated as an example and user-friendly formulas are listed and used to calc ulate sensor signal and noise.