Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2004-04-30
2010-12-28
Epps, Georgia Y (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S208100, C250S214100, C348S302000, C348S308000
Reexamination Certificate
active
07858917
ABSTRACT:
A photon-counting Geiger-mode avalanche photodiode intensity imaging array includes an array of pixels, each having an avalanche photodiode. A pixel senses an avalanche event and stores, in response to the sensed avalanche event, a single bit digital value therein. An array of accumulators are provided such that each accumulator is associated with a pixel. A row decoder circuit addresses a pixel row within the array of pixels. A bit sensing circuit converts a precharged capacitance into a digital value during read operations.
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Aull Brian F.
Felton Bradley J.
Kosicki Bernard B.
Loomis Andrew H.
Reich Robert K.
Epps Georgia Y
Gauthier & Connors LLP
Legasse Jr. Francis M
Massachusetts Institute of Technology
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