[sdiy] Moog Ladder Filter Theory of operation

[Magnus Danielson]

From: "Brett, Bill" <BJB at dolby.com>
Subject: [sdiy] Moog Ladder Filter Theory of operation
Date: Wed, 25 Jun 2003 15:14:59 -0700

> 
> Greetings,
> I am troubleshooting a moog ladder filter that I put together and was wondering if anyone knows of a good written theory of operation for this circuit.

Bob Moogs patent for it is actually quite readable.

It's US Patent 3.475.623, filed 1966-10-10 and approved 1969-10-28.

You can look at Don Till's page http://www.till.com/articles/moog/patents.html

I am sure others will point to excelent resources.

Cheers,
Magnus