So we're studying Schmitt triggers at university and we got these representations. Searched them on google for more info and got other representations. Now I'm confused. Can anyone help me with some info regarding the correctitude of these gates?
The representation we got for a positive hysteresis trigger:
This one was ok, found it the same online.
The representation for inverting trigger I found online:
Another representation I found online:
The representation we got on our course:
Now, with my logic, the one we got on class for inverting trigger is wrong. May anyone confirm or help understand it if I got it wrong? Also, how does it affect the signal output, is it the same as the positive hysteresis one with non inverting gate?