Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx>
Sure, but Q is energy lost vs energy stored in one cycle. In a time varying system what's the period of one cycle? Q is a nice shorthand to compare various resonant systems, but except for trivial systems it doesn't work all that well. Probably a better way to look at it is in terms of phase noise.Original poster: Ed Phillips <evp@xxxxxxxxxxx>
"I think that the whole concept of Q and bandwidth is somewhat troubling when applied to time varying systems. Certainly, the analysis it such systems is more complex than we can deal with in a few short paragraphs on this list."
Correct. However, the concepts of stored and dissipated energy and their ratios are simple enough for all to understand.
Ed