[sdiy] 4-pole SSM2164 filters [was: Roland System 700 VCF]

[lanterma at ece.gatech.edu]

On Jul 10, 2010, at 11:45 PM, Stewart Pye wrote:

> When I get some 2164's I'll breadboard it, probably with a soft clipping stage in the feedback path, but not an OTA for voltage control.

This might also be of interest - a while back one of my students, Sid, rigged up a "variable slope" version of it:

http://users.ece.gatech.edu/~lanterma/studentprojects/sid_2164_variableslope.pdf

Note: there is an R2 given with a suggested range of 4.7K to 20K in the diagram. Sid didn't note in the report what value he used, but when I asked him about it, he said he thinks he used 10K.

- Aaron