[sdiy] OTA to replace variable resistor

Chris McDowell declareupdate at gmail.com
Fri May 1 19:02:24 CEST 2020


Well, that's suddenly obvious haha. Easy to overlook in a different context. 

> On May 1, 2020, at 6:04 AM, René Schmitz <synth at schmitzbits.de> wrote:
> 
> On 30.04.2020 23:56, Chris McDowell wrote:
>> Hah, wow. I have never seen the datasheet "voltage-controlled resistor" used! I admit I've never even gave it much thought. When I was new to all of this, and asked the community "hey, how do I make an OTA work like a voltage controlled resistor" the response was "well you can't, figure out how to need a VCA instead." wild. It works really well in the this context.
> 
> You can also think of this as a 1 pole lowpass filter. The input being 0v. (if you make the input some positive voltage, you can get an attack portion too.)
> Best,
> René
> 
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