[sdiy] Article "Analyzing the Moog Filter"

henry birdseye henry.birdseye at gmail.com
Sat Aug 24 18:37:47 CEST 2019


What a wonderfully complete document that is. Thanks.

On 8/23/2019 5:23 PM, mskala at ansuz.sooke.bc.ca wrote:
> On Fri, 23 Aug 2019, Donald Tillman wrote:
>> On Aug 23, 2019, at 9:09 AM, Quincas Moreira <quincas at gmail.com> wrote:
>>
>>        Don’t forget the Leapfrog topology as implemented by Matthew
>>        Skala.
>>
>>
>> I don't know it.  'Gotta schematic?
>    https://files.northcoastsynthesis.com/msk-007.pdf  (page 69 of the PDF)
>
> One of the important properties of this topology is that it in some sense
> minimizes component dependence - which is important for keeping the shape
> of the curve reasonably consistent when tuning it, given that I'm trying
> to keep five OTAs tracking each other.  If you like implementation
> details, you might also like the way I'm using different linearizing-diode
> currents to set the fixed proportion between the different integrator time
> constants.
>


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