[sdiy] CEM3372 passband gain trick?

Doug Terrebonne dougt55 at yahoo.com
Sun Aug 12 09:21:43 CEST 2012

Couldn't it be as simple as adding the res CV to the VCA?


--- On Sat, 8/11/12, Lanterman, Aaron <lanterma at ece.gatech.edu> wrote:

> From: Lanterman, Aaron <lanterma at ece.gatech.edu>
> Subject: [sdiy] CEM3372 passband gain trick?
> To: "SDIY List" <synth-diy at dropmix.xs4all.nl>
> Date: Saturday, August 11, 2012, 7:29 PM
> Looking over the CEM3372 VCF
> datasheet, this line caught my eye:
> "A unique feature of the 24db/octave filter is that, unlike
> others of this type, the passband gain reminds constant as
> the amount of resonance is varied, this eliminating the
> annoying drop in volume at higher resonance settings."
> Any ideas how the CEM3372 pulls that off?
> - Aaron
> P.S. What does "VCF Uses Open Loop Design for Enhanced Sound
> Richness" mean?
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