Re: Risetime calculator (in tekwiki)
Sorry to keep beating beating the dead horse but I wanted to find out what is important in this circuit and what is not.toggle quoted messageShow quoted text
It turns out any shunted (or even shorted) linear pot has quadratic and linear components of its partial resistance.
Quadratic component is always there, which is good.
What is not that good - is lenear component that contaminates the output.
But (and this is where the trick is) if the shunting resistance is equal to the nominal pot value then linear component is cancelled out and the result is purely quadratic function of wiper position (if the track is linear taper.)
On Sun, Jan 19, 2020 at 08:27 PM, Albert Otten wrote:
This originates I think from the idea that around a maximum or minimum a