Amateur Extra › E7 Practical Circuits › E7G05
E7G05
How can unwanted ringing and audio instability be prevented in an op-amp audio filter?
Pick an answer to check it.
Answer: A. Restrict both gain and Q
Too much gain or too high a Q in an active filter makes it ring and can cause oscillation. Keeping both gain and Q restricted keeps the filter stable.
Tip: Keep gain and Q modest.