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Hello,

I am designing a circuit which basically takes two voltages (V

Minimal input voltage is ±0.72V, voltage used to power the comparator is 12V, resistors are not known.

Output voltage will change based upon voltages given by these expressions.

I am designing a circuit which basically takes two voltages (V

_{1},V_{2}) and based upon which one of the two is greater, turns corresponding LED. So, I have got to the part where I have output from differential op amp that is the input of the inverting voltage comparator with hysteresis. Comparator compares that voltage with ground, which tells me whether that voltage is positive or negative or V_{1}>V_{2}, V_{1}<V_{2}. Comparator is shown bellow.Minimal input voltage is ±0.72V, voltage used to power the comparator is 12V, resistors are not known.

Questions:Questions:

- What is the ideal hysteresis voltage, a little less than minimal input voltage?
- I have found some expressions in the book and if someone is willing to clarify them( which value is which apart from the resistors ) it would help.

Output voltage will change based upon voltages given by these expressions.