Bistables with hysteresis, e.g. Schmitt trigger

Circuits for generating electric pulses; Monostable, bistable or multistable circuits > Generators characterised by the type of circuit or by the means used for producing pulses > by the use, as active elements, of field-effect transistors with internal or external positive feedback > Bistable circuits > Bistables with hysteresis, e.g. Schmitt trigger

Circuits for generating electric pulses; Monostable, bistable or multistable circuits (H03K4/00 takes precedence; for digital function generators in computers G06F1/02) > Generators characterised by the type of circuit or by the means used for producing pulses (H03K3/64 - H03K3/84 take precedence) > by the use, as active elements, of field-effect transistors with internal or external positive feedback (H03K3/023, H03K3/027 take precedence) > Bistable circuits > Bistables with hysteresis, e.g. Schmitt trigger