An uncooled VGA-IRFPA with novel readout architecture
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Published:2011-07-29
Issue:
Volume:9
Page:107-110
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ISSN:1684-9973
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Container-title:Advances in Radio Science
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language:en
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Short-container-title:Adv. Radio Sci.
Author:
Würfel D.,Ruß M.,Lerch R.,Weiler D.,Yang P.,Vogt H.
Abstract
Abstract. An uncooled VGA Infrared Focal Plane Array (IRFPA) based on microbolometers with a pixel pitch of 25 μm for thermal imaging applications is presented. The IRFPA has a 16-bit digital video data output at a frame rate of 30 Hz. Thousands of Analog to Digital Converters (ADCs) are located under the microbolometer array. One ADC consists of a Sigma-Delta-Modulator (SDM) of 2nd order and a decimation filter. It is multiplexed for a certain amount of microbolometers arranged in a so called "cluster". In the 1st stage of the SDM the microbolometer current is integrated time-continuously. The feedback is applied using a switchable current source. First measurements of Noise Equivalent Temperature Difference (NETD) as a key parameter for IRFPAs will be presented.
Publisher
Copernicus GmbH
Reference5 articles.
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