I decided that I will be using an Inverting Schmitt Trigger for sensing if my Power Setpoint voltage is less than 3V or not. I have allready calculated (in my prior circuits) the resistor values I needed but I have been searching online (if I was home I would open my textbook and probably find it faster) and can't find the formula needed to calculate the value of my feedback resistor.
1) Is this something that should be calculated or is it a given value that will work for most circuits?
2) I found online
calculators, but I would like to know the formula.
3) Also I would still need a 100kOhm resistor from my 'Power Setpoint signal' to ground, correct?
Thanks in advance