Bridged T filter formulas. Q and bandwidth estimates and other basic formulas

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Hi there,
I've spent several days trying to figure out this bridged T circuit and the basic formulas someone would need. Unfortunately, there were no good easy formulas for Q or bandwidth so I made/derived a formulas for them. They are estimates only, but quick and easy. Here is a summary of everything I found. The Q formula and bandwidth formulas I came up with and if you'd like to see how I did it you can check out what I did. I basically used the high pass section to get the low cutoff frequency and low pass section to get the high cutoff frequency. It was a lot easier than using the inverse function of the transfer function, which seemed awfully difficult.

https://sites.google.com/site/garydavenportelectronics/home/bridgedtnotchfilter

bandwidthandQderivation.png

Summary%20of%20Bridged%20T%20Formulas.png

I would appreciate any critiques/suggestions about this because its quite complicated.
 
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