Electrical Engineering › Section Q · Thyristors, operational amplifiers, and power conversion › Topic Q.5
Negative feedback and divided feedback
An op-amp on its own slams from rail to rail. Feed part of its output back to the inverting input and it settles instead at exactly the output that keeps its two inputs equal, giving gains set by two resistors and almost nothing else.
In this topic
- Closing the loop
- How close is close?
- The two golden rules
- The voltage follower
- Divided feedback: the noninverting amplifier
- Worked example: a noninverting amplifier
- The inverting amplifier
- Worked example: an inverting amplifier
- A lever picture
- Common mistakes to avoid
- Key takeaways
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