<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2018) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (March 2018) (Learn how and when to remove this template message) </Td> </Tr> <P> In electronics, a Schmitt trigger is a comparator circuit with hysteresis implemented by applying positive feedback to the noninverting input of a comparator or differential amplifier . It is an active circuit which converts an analog input signal to a digital output signal . The circuit is named a "trigger" because the output retains its value until the input changes sufficiently to trigger a change . In the non-inverting configuration, when the input is higher than a chosen threshold, the output is high . When the input is below a different (lower) chosen threshold the output is low, and when the input is between the two levels the output retains its value . This dual threshold action is called hysteresis and implies that the Schmitt trigger possesses memory and can act as a bistable multivibrator (latch or flip - flop). There is a close relation between the two kinds of circuits: a Schmitt trigger can be converted into a latch and a latch can be converted into a Schmitt trigger . </P> <P> Schmitt trigger devices are typically used in signal conditioning applications to remove noise from signals used in digital circuits, particularly mechanical contact bounce in switches . They are also used in closed loop negative feedback configurations to implement relaxation oscillators, used in function generators and switching power supplies . </P>

Difference between comparator and schmitt trigger using op amp
find me the text answering this question