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I was working on question 2.23(a) and there is asked what input voltage is needed in order to ensure that the output does not clip. The clipping limits are +10 to -10 V.

I solved that, and, basically, what I did was that first I nulled the input voltage and found the output voltage due to the offset voltage source connected to the positive terminal of the opamp and then I nulled the offset source and found the contribution of the input voltage to the output voltage (superposition) and then I added the two (output voltage contributions) and put them equal to 10, which is the saturation voltage for the opamp.

However, my answer to question 2.23 is not correct. So I wanted to ask: if I am not doing it correctly, how do I do it then? Here is the circuit I used:

schematic

simulate this circuit – Schematic created using CircuitLab

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  • \$\begingroup\$ This site has a built-in schematic editor. It's a lot easier to use than editing an existing image! \$\endgroup\$
    – Hearth
    May 1, 2017 at 16:49
  • \$\begingroup\$ What values did you get? \$\endgroup\$
    – Chris M.
    May 1, 2017 at 20:47
  • \$\begingroup\$ I got 7 mV for the max amplitude of input sine wave in order to avoid output clipping. But the answer indicated is 10 mV \$\endgroup\$
    – Moeen Ahmed
    May 1, 2017 at 23:02

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