loose-electron
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Posts: 1638
San Diego California
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This is, how shall I say it, totally unique to the transistor level architecture of the comparator.
Rail to rail common mode comparators are possible (both an NMOS and PMOS diff pair at the input, and some recombination circuitry afterwards) and all kinds of other variations on a theme.
Specifying a common mode range and operating limitations should not be a problem in most cases.
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