Dear members of All About Circuits,
I am still stuck on a (I guess) quite easy question about Op Amps.
I must find Vout on the circuit in the picture.
I've found that
- On the red and the blue branches the current is 20microA.
- On the positive terminal I have 2 V, and, from the principles of the Op Amp, I must have 2 V on the negative terminal as well.
- On the feedback loop my current is 40microA (which multiplied by the 100k resistor gives 4V, which apparently is not the result).
Using a circuit simulator, I've found that Vout is 6V.
I can't demonstrate that, though.
I think I need to use KCL for the red and the blue nodes, but I don't know how to show that.
Can anyone please help me?
Thank you so much.
All the Best.
I am still stuck on a (I guess) quite easy question about Op Amps.
I must find Vout on the circuit in the picture.
I've found that
- On the red and the blue branches the current is 20microA.
- On the positive terminal I have 2 V, and, from the principles of the Op Amp, I must have 2 V on the negative terminal as well.
- On the feedback loop my current is 40microA (which multiplied by the 100k resistor gives 4V, which apparently is not the result).
Using a circuit simulator, I've found that Vout is 6V.
I can't demonstrate that, though.
I think I need to use KCL for the red and the blue nodes, but I don't know how to show that.
Can anyone please help me?
Thank you so much.
All the Best.
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