G = 1/B = Vo/Vi = (R1+R2)/R2 ≈ A/(1+AB)
Only if AB >> 1
- Negative feedback(AB = positive)
- A = Open loop gain
- B = Feedback gain
- G = Closed loop gain
If AB >> 1, VR1 = Vo & VR2 = Vi
Set the resistors to set the gain :)
These 2 circuits are electrically the same. Just a little layout difference, and the left circuit has a voltage source with twice the frequency of the left.
