Asynchronous low-power analog-to-digital converter circuit with configurable thresholds
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United States of America Patent
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Apr 12, 2016
Grant Date -
Mar 24, 2016
app pub date -
Sep 24, 2014
filing date -
Sep 24, 2014
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Abstract
An analog-to-digital converter circuit is described that includes register space to keep one or more values to establish upper and lower thresholds of the analog-to-digital converter. The analog-to-digital converter circuit also includes first and second comparators to compare an analog input signal against the upper and lower thresholds and to trigger an analog-to-digital conversion process in response to the analog input signal crossing one of the thresholds. The analog-to-digital converter circuit also includes first logic circuitry to discard a result of the analog-to-digital conversion process if the result is within a prior analog-to-digital conversion process's thresholds. The analog-to-digital converter circuit also includes second logic circuitry to provide the result as an output and generate an interrupt if the result is not within the prior analog-to-digital conversion process's thresholds.
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