Non-inverting Amplifier - Almost ideal

102

01:04:29

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.

published 8 years ago

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