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Question on analog passive filter optimization

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poorren

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Folks,
Here's a bandpass filter with upper/lower corner frequency around 30Mhz/3Mhz. Because the bandwidth is much wider than center

frequency, it actually constructs by cascading a 30Mhz lowpass with 3Mhz highpass. The simulated response meets my expectation.

However, when trying to implement that filter, I want to make a bit optizimation on that big inductor (2.2uH) and small cap

(10pF/22pF). Yes, I could do nothing but directly implement them. It's implementable.


My question is whether there's some method to convert shunted series-LC section or series shunted-LC section to some more

convenient value. I know the norton transform has the ability to simplify circuit, however, I don't know if it could be applied to these structures.

Do anyone have some suggestion on that? Thanks advance!
 

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The most simple and most direct method would be to insert your filter requirements into a design program for passive filters.
I can recommend AADE from aade.com. It`s freeware, very versatile and you can choose the impedance niveau as you like..
 

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