On-focal-plane analog-to-digital conversion for current-mode imaging devices
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United States of America Patent
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Mar 23, 1999
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N/A
app pub date -
Aug 21, 1997
filing date -
Aug 21, 1996
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Abstract
A current-mode analog-to-digital converter based on a current copier circuit with a constant bias current that is independent of the input signals. A second-order incremental .SIGMA.-.DELTA. conversion configuration is implemented. An array of such analog-to-digital converters can be integrated onto the focal plane of an imaging sensor array to achieve column-wise parallel analog-to-digital conversion.
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