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Analog Filters: a Compilation of Standard Transfer Functions (UPDATED 2)

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mick_lee:
Why would you do this? Anatoly Zerev did this in 1967!  |O
https://www.amazon.co.uk/Handbook-Filter-Synthesis-Anatol-Zverev/dp/0471749427

TonyStewart:
I recall having used variable Q with a constant peak gain and tuneable f BPFs in my grad thesis in the mid-70s and discovered a relationship not taught in school about GBW is not G * BW in active filters.

I discovered that the required GBW in active filters is actually  GBW = G* BW * Q²

The Q² significantly challenges Op Amps, especially with Q's = 100.  Fortunately, GBQ = 100 MHz Op Amps do exist and a couple more than this.  I have validated this using the TI Analog filter application, which used to be downloadable but shows the ideal and actual response with the required GBW and Q of each stage.

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