[sdiy] tau ladder filter

[Jim Patchell]

Wow...can't believe I drew that 8 years ago.

I have the TAU pcb somewhere, with all the parts...and I think I 
soldered them on, but never fired it up.....

-Jim

Dave Manley wrote:
> I thought I'd seen every configuration of ladder filter, but I stumbled 
> on this Tau 1010 Ladder Filter as transcribed by Jim Patchell.
> 
> http://www.freeinfosociety.com/electronics/schematics/audio/tau1010ladderfilter.pdf 
> 
> 
> Is there a reason why using PNP's in the ladder is of any benefit or was 
> this just some form of patent infringement avoidance? (I have to admit I 
> haven't tried to look at the dates of the circuit vs the patent, vs the 
> claims, etc).
> 
> -Dave
> 
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