Superconductive circuits for on-FPA IR digital signal processing

Arthur S. Jensen; David M. Burnell

doi:10.1117/12.137789

1 September 1992 Superconductive circuits for on-FPA IR digital signal processing

Arthur S. Jensen, David M. Burnell

Proceedings Volume 1685, Infrared Detectors and Focal Plane Arrays II; (1992) https://doi.org/10.1117/12.137789
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

Digital signal processing (DSP) on focal plane array (FPA) is attractive for large focal planes for reducing the amount of data output to no more than that which is of interest and for simplifying the IO to a simple digital bus. However, semiconductor circuits dissipate too much power for use on the FPA, overloading the cooling system capability, and requiring too much system cooling power for many applications. On the other hand, superconductive circuits (SC) offer an attractive alternative because they dissipate only about 0.1% the power of semiconductor circuits for an equivalent circuit function. SC 12 bit A/D converter and SC shift registers demonstrated in Nb at 4 K are readily convertible to NbN at 10 K. As the development of active devices in YBa₂Cu₃O₇ matures, these and a full complement of logic devices should be possible as high as 80 K. Scene signal and detector leakage current considerations require that long wavelength IR/FPA using quantum detectors must operate at cryogenic temperatures (< 80 K). It is no significant burden to use SC circuits at these cryogenic temperatures. SC circuits operate so much faster than semiconductor circuits and SC memory circuits are so relatively limited in size that DSP architecture has to be restructured. The derived benefit in terms of system capability will warrant this investment.

Citation Download Citation

Arthur S. Jensen and David M. Burnell "Superconductive circuits for on-FPA IR digital signal processing", Proc. SPIE 1685, Infrared Detectors and Focal Plane Arrays II, (1 September 1992); https://doi.org/10.1117/12.137789

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KEYWORDS

Digital signal processing

Staring arrays

Semiconductors

Cryogenics

Niobium

Cooling systems

Infrared detectors

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