Rotary Potentiometers: There Must Be a Better Option

摘要

Q: I'm trying to use a potentiometer (pot) in the feedback loop of an op amp circuit, but the adjustment is too sensitive. Do you have any suggestions on how to improve the performance of this circuit? A: The first thing I would tell you is to be careful when using pots in feedback loops, especially at higher frequencies. Wire wound pots have lots of inductance and can cause instability. Watch out for carbon pots as they are noisy.