Doesn't "schmidt trigger" imply some positive feedback to "snap" the
output/internal gates to a digital state especially quickly, in addition to
the hysteresis?  (rather than leaving transistors/etc in a possibly linear
region of operation, prone to oscillations and/or excessive power
consumption.)  In fact, I thought the hysteresis was a byproduct and/or
method used to achieve this capability, and the "important" part of a
"schmidt trigger" was its ability to correctly operate with slowly changing
(ie analog) input levels...

BillW

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