I was thrown off by a certain website while learning about a op amp Schmitt trigger design. The layout was the same inverting config as the above schematic but gave a confusing answer to calculating high threshold.
Vout=5v high Vout=0v low Vref=5v
For the Vout low hysteresis the calc was:
For Vout high hysteresis was
Vout low made sense, but if Vout high was 5v I would have thought it would be (R2)/(R2+R3||R1)*Vref.
When I checked online calculator apparently I was correct. Can anyone set the record straight? Thanks.