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As per my derivation it should be is = VoR2/[(R1R2) + R3(R1+R2)].
The current source is an unchangeable constant. How can it be dependant on Vo?
Ratch
The current source is an unchangeable constant. How can it be dependant on Vo?
"is" is not unchangeable. It is just an equation, divide both sides with "is" and "Vo", then calculate the multiplicative inverse of both sides. You will see how Vo depends on is then.
By the way, a minus sign is missing from mjuneja's formula I think.
"is" is not unchangeable. It is just an equation, divide both sides with "is" and "Vo", then calculate the multiplicative inverse of both sides. You will see how Vo depends on is then.
By the way, a minus sign is missing from mjuneja's formula I think.
hello! the circuit above is assumed to be ideal op-amp
my books says that it should be View attachment 144473 I still don't get how it arrived to this form.
What I did is to first draw an equivalent model of the circuit, then using the ideal op-amp characteristics I came up with the diagram (2) but then if that was correct Vo = 0v.
View attachment 144472
Can you please tell me how it arrived with the solution given by the book. Is my diagram above the right equivalent circuit for the problem in question?
That is an easy question to answer. Take frankrose's equation for Vo and find the limit as As goes to infinity. That should give you the same answer your book shows. Remember, an ideal opamp has infinite gain. I cannot make sense out of what you are doing in your attachment.
Ratch
Is my equivalent circuit correct?