Comparator input noise issue.

[kushal4269]

I am using LM393 op-amp as zero crossing detection.
circuit uses dual supply with positive and negative supply of 5V as I have differential signals.
When I connect signal it creates square wave according to input, but due to inherent noise in input comparator output is also noisy near transition.
Is there any way I can remove or reduce input noise when no signal is connected to opamp(i.e. inherent noise of input) So I can get clear output. I am using both the op-amps of dual op-amp IC LM393 as I have two different signals.

[Circlotron]

https://www.analog.com/en/resources/analog-dialogue/articles/curing-comparator-instability-with-hysteresis.html

[moffy]

Further to what Circlotron has already mentioned, add some hysteresis or positive feedback to the comparator:
https://www.ti.com/lit/ug/tidu020a/tidu020a.pdf
https://circuitcellar.com/resources/comparator-hysteresis-2/