How does an Op-Amp "find" equilibrium (w/ Negative Feedback)?

AI Thread Summary
An op-amp achieves equilibrium through negative feedback, which stabilizes the output voltage by continuously adjusting the differential input voltage. When a step input is applied, the op-amp initially responds to the large differential voltage, driving the output toward a high value until the feedback reduces the differential input to a minimal level. This process involves a phase delay and can lead to overshooting or oscillation if not properly compensated. The equilibrium point is reached when the feedback current balances the input current, resulting in a stable output voltage that closely matches the desired gain. Understanding this behavior requires recognizing the interplay between feedback and the op-amp's internal characteristics, rather than relying on iterative models.
  • #51
jim hardy said:
It's a differential amplifier - amplifies the difference between the two inputs. old jim
Thank you.
 
  • Like
Likes jim hardy

Similar threads

DC input random offset voltage for diff. amplifier with current-mirror load
Replies
2
Views
1K
Question for stability of negative feedback OP-AMP
Replies
5
Views
3K
I Understanding Op-Amp negative feedback
Replies
18
Views
4K
Understanding the Equalizing Nature of Negative Feedback in Op Amps
Replies
2
Views
2K
Op amp with zener in feedback loop
Replies
2
Views
8K
A question regarding electronic negative feedback
Replies
10
Views
2K
Engineering Why is the voltage source high potential into node 1 at -12 V in this op amp problem?
Replies
15
Views
2K
How to clasify if it's an inverting/non-inverting op amp
Replies
33
Views
6K
How does negative feedback in an op-amp work conceptually.
Replies
6
Views
8K
How does an opamp work as non-inverting amplifier
Replies
11
Views
3K

Hot Threads

Recent Insights

Back
Top