Introduction: The section below is the explanation for the Schmitt Trigger.
- If there is any sort of noise as an input to the comparator, the output can be in the erractive situation when vin is closer to the trip point.
- For case in point, with parallel to a zero crossing, there is the lowest output wherein vin is in positive range and highest in case of negative vin.
- Other than this, if the input consists of a noise voltage along with the peak of greater or equal to 1mV, then in such a case the comparator will notice the zero crossing developed by noise.
- Fig 1.1 displays the zero crossing output discovery if there is noise in the input.
- With a reason of voltage divider circuit, it consist the positive feedback voltage.
- In a situation wherein OPAMP is saturated positive, then in such a case, a positive voltage is the resultant feedback to the input that is non-inverting input, holding the output in the higher stage. (vin< vf).
- With the negatively saturated output voltage, a feedback that is negative voltage to the case inverting input, investing the output in the lower state.
- Next the output being +Vsat, then here the reference voltage Vref is known by
- If Vin is counted lesser in comparison to Vref then the output will continue to be +Vsat.
- When input vin hands to greater than Vref = +Vsat the output, it switches from +Vsat to –Vsat. Here the reference voltage shall be given by
- The output will continue to be –Vsat as long as vin > Vref.