Is this stupid?

[Magnus Danielson]

>>>>> "TA" == Tony Allgood <oakley at enterprise.net> writes:

Hi Tony!

 TA> Hi all,
 TA> This may be a stupid question but I'll ask it anyway.

It is a good startingpoint to learn something.

 TA> Has anyone ever tried
 TA> using inductors in a Moog ladder instead of the capacitors to make a VCHPF?
 TA> I guess you would need to put some cap in series with the Ls to block any
 TA> DC.

Well, it is an interesting thought, but I am not sure that the result
would be acceptable. Also, be aware of mutual inductances...

 TA> And secondly, has anyone found a need for taking a differential tap off the
 TA> ladder at another point other than below the top pair to create reduced
 TA> steepness of slope?

Well, if you added more taps as you proposed, then you would get a
result similar to a state-variable filter. You could sum the outputs
differently to create the diffrent responces. I haven't done the
homework so I doesn't know the exact small-signal responces and thus
can't calculate the scaling formulas. I am however confident that this
could be done.

It is however interesting to consider that the Moog 904B HP filter has
a very different layout and this was for some now forgotten reason.

Cheers,
Magnus