VG1, VG2, VG3 are 3 phase AC source, with an input signal voltage varying from 1V to 2.9V. VG4, VG5, VG6 are 100mv(1000Hz) added to introduce noise.
I'm calculating zero crossing with reference to line 2(Reference) in the given circuit. The intention of the circuit is to detect line voltage zero crossing. i,e, Line voltage of V1 and V2.
I observe that at low value input signals, there is false triggering. and also, if i increase noise signal amplitude there is false triggering. i tried using TLV3201(Comparator), results are worse. Kindly help with what is happening.
1.How do i add hysteresis to this circuit to avoid false triggering at low value signals?
2. Is there a better and simpler way to do it?