What is a feedback resistor and capacitor? Why are they are used in amplifier circuits?
Electronic – Feedback Resistor and Capacitor in amplifier
capacitoroperational-amplifierresistors
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Best Answer
To understand why they are needed you first need to understand the basics of the opamp. There are a few simplified rules that you can use to help you solve any opamp circuit:
If you apply these two rules to your circuit you will find that you can use any other standard circuit analysis method to solve your circuits.
It turns out that you can get some very basic equations for specific configurations, but they all are derived from circuit analysis combined with the rules I mentioned.
If you have a specific configuration that you are having a hard time understanding how it operates, feel free to post a schematic of it and we can help explain it.