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Cgs synth

Index last updated: 2026-04-28 23:16 UTC

Message

Re: CGS VCO

2004-03-15 by sasami@hotkey.net.au

>I do have a question for Ken. The sawtooth buffer amp shows a 330K
>feedback resistor and a 240K bias on the schematic. I inserted pots and
>adjusted to get a +/-5V sawtooth. The values turned out to be exactly
>200K / 600K, just like the ASM-1. This is also just what you would
>expect to convert the 0-5V signal out of the CA3140. Double the voltage
>(200K/100K), then offset the 0 to -10V result back to +/-5. I think
>maybe the 330K/240K values are for a +/-12V power supply.

Yes, that would be the case :)

Ken
_______________________________________________________________________
Ken Stone sasami@... or ken@...
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>

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