Hi All,
Something has me stumped, and it's pretty fundamental: If I'm designing an LC bandpass filter for the output of my narrow-band amplifier, how could I possibly do this with any accuracy whatsoever, considering that when I design each separate stage I must initially "assume" that each will see an infinitely wideband and perfect 50 ohm match at both their input and output ports. But this is certainly
*not* what the amp and the filter will see when they are cascaded together, since the stopbands of the filter (and the amplifier) will be anything *but* 50 ohms. This would dramatically (I would think!) change the response of the filter near and in the stopbands, as well as affect the amplifier's stability and gain. How could anyone even remotely be able to take this into account in the initial design stage? Perhaps I'm completely wrong about this being an issue at all? I realize we can cascade and then tweak the stages after designing them, but I would like to know how to take this into account before that -- or if I even have to?Thanks!
-Bill