R[sub]D[/sub]A Requirements For Optimum Hybrid Focal Plane Performance

S. B. Grossman; R. B. Emmons; S. R. Hawkins

doi:10.1117/12.932796

30 June 1982 R_DA Requirements For Optimum Hybrid Focal Plane Performance

S. B. Grossman, R. B. Emmons, S. R. Hawkins

Proceedings Volume 0311, Mosaic Focal Plane Methodologies II; (1982) https://doi.org/10.1117/12.932796
Event: 25th Annual Technical Symposium, 1981, San Diego, United States

Abstract

In analyzing the performance of direct-injected hybrid focal plane arrays, many factors must be consiaered in determining the minimum detector resistance-area product R_DA neces-sary to obtain background-limited performance (BLIP) and good array uniformity. In photo-aioue arrays, a necessary but not sufficient condition is that noise due to the diode generation-recombination and diffusion currents are less than the background photon shot noise. Tnis places a minimum requirement on the magnitude of RoA, the zero bias resistance area product. In addition, there are generally much more stringent requirements on R_DA uue to input MOSFET l/f noise and threshold variations which exceed the single detector R_oA requirement for BLIP operation at a given background. In general, the input thresnolu variations require that the photodiodes be somewhat back-biased. This produces a substantially higner average R_DA at the expense of higher detector l/f noise due to surface leakage. In tnis study we have investigated the detector impedance requirements in terms of tne injection efficiency, threshold nonuniformities, the input MOSFET excess (l/f) noise, and tne detector excess noise. For state-of-the-art parameters, it was determined tnat tne input MOSFET l/f noise always dominates the other elements in determining the required detector impeaance:k

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S. B. Grossman, R. B. Emmons, and S. R. Hawkins "R_DA Requirements For Optimum Hybrid Focal Plane Performance", Proc. SPIE 0311, Mosaic Focal Plane Methodologies II, (30 June 1982); https://doi.org/10.1117/12.932796

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KEYWORDS

Diodes

Field effect transistors

Sensors

Charge-coupled devices

Resistance

Staring arrays

Infrared sensors

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