- An ideal op amp could provide an infinite output voltage range.
- A very good op amp could provide outputs at least up to the power supply voltages.
- Most op amps fall short by about two volts so with a 12 volt supply, the output would be only ten volts.
- The output should be directly proportional to the input. That is perfectly linear.
The image below shows ideal (black line) and non-ideal (red and blue lines) behaviour including clipping when the op amp is saturated and the output voltage can go no higher.
source:http://www.softwareforeducation.com/wikileki/index.php?title=Ideal_Op-Amps
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