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Homework Statement
[PLAIN]http://img546.imageshack.us/img546/2389/opamp.png
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All resistances are "R".
Find the output to input ratio for this Op-amp
Homework Equations
KCL, KVL, Voltage divider.
The Attempt at a Solution
I know no current flows into the Op amp through the inverting terminal so all the current flows into the feedback loop.
I know i can then use KVL and KCL to work out the current equivalencies such as:
KVL around the first loop in the feedbackloop:
(i1*R)-(i2*R) = 0
therefore: i1=i2.
KCL at the frst node in the Feedback loop gives:
i1+i2 = i3.
around the second node gives:
i3+i4 = i5.
KVL around the final loop in the feedback loop gives:
(i4*R) + (i5*R) = 0
But my main problem is trying to relate all this to the output voltage which i can't seem to get an expression for.
Please help
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