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A buffer or gate containing a small hysteresis loop glyph.
Also known as: Hysteresis input, Schmitt input, Squiggle inside a gate, Trigger gate
The little rectangular loop drawn inside a gate marks a Schmitt trigger: it switches at a higher threshold going up than coming down, which is what stops a slowly changing or noisy input producing a burst of output transitions. The glyph is a picture of the hysteresis curve itself.
Denotes an input with hysteresis: different switching thresholds for rising and falling signals.
Contexts: Electrical equipment
Is marked by a small glyph of the hysteresis loop drawn inside the gate outline, which is a miniature of the transfer characteristic.
Contexts: Electrical equipment
Cleans up slow or noisy edges, preventing the multiple transitions an ordinary gate would produce as its input crosses the threshold.
Contexts: Electrical equipment
A gate outline containing a small symbol of two horizontal strokes joined by short verticals at opposite ends, forming a flattened S.