What's quality factor in oscillation ?

1. Jan 5, 2010

abcdefg10645

What's "quality factor" in oscillation ?

I want to know why and how it was defined ?

Is it useful in some ways ?

2. Jan 5, 2010

f95toli

Re: What's "quality factor" in oscillation ?

Quality factor ("Q") is only useful for damped oscillations; it is basically measure of how long it takes for the oscillation to die out or -equivalently- how narrow the oscillation is in frequency space (e.g a very "selective" filter has a high Q value).