Redundant analog built-in self test
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United States of America Patent
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May 28, 2024
Grant Date -
Jul 6, 2023
app pub date -
Jan 3, 2022
filing date -
Jan 3, 2022
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Abstract
Described embodiments include a test system having first, second and third circuits having the same design and configured to receive a same input signal. A majority voter circuit has a first voter input coupled to a first circuit output, a second voter input coupled to a second circuit output, a third voter input coupled to a third circuit output, and a voter output. The output signal is equal to a signal present at least two of the voter inputs. A discrepancy detector circuit has first, second and third discrepancy inputs coupled to the first, second and third circuit outputs, respectively. A discrepancy output is configured to: provide a first logic signal responsive to the first, second and third circuit outputs having equal values; and provide a second logic signal responsive to the first, second and third circuit outputs having unequal values.
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