Impedance matching in filter circuits (11 - Passive Filters)

[@D.E._Sarcarean]

I typically don't subscribe to channels of less than 100K, but for this quality content, I will make an exception.

[@muk280]

glad i found this channel

[@bradparker6156]

Thank you for this useful reference for an aging RF Engineer. There are of course other ways of achieving impedance matching. One of these amounts to moving the poles onto circle defined by |sk|=Rs/RL OR RL/Rs, while preserving phase angle of poles of standard prototype. It does have negative effect of transforming a symetrical odd order ladder network to an asymmetrical one (as you know, even order ones are already asymmetrical), doubling component count. It also means those tables cannot be used directly..

[@yoksel99]

The third method only takes care of the corner frequency. The flatness of the rest of the filter response will suffer in other points, for example if this is an LPF or a bandpass filter. Also, transformers are bulky and expensive, but they don't have too much loss. Depending on the frequency and design, of course.

[@SpinStar1956]

Great video! Just ran across your channel; looks like a lot of good content 😊

[@bob_mosavo]

Thanks, Prof. Danner 👍

[@TR3A]

Please use some examples from audio applications (e.g., building speakers). In those cases we need to be able to accommodate impedances that might not be known (e.g., different stereo amps have different impedances and different drivers have different impedances).

[@mohameddrissi1075]

hi sir , could we match impedances with 1 order filter ?