VRef formula?

[blooze_man]

I've noticed from looking at many schematics that a Vref is made by two equal value resistors and an electro cap (I'm assuming you know how to connect them). My question is: do the values matter as long as the resistors are the same? I ask because I've noticed many different values used for the resistors and capacitor and what they always have in common is the equal value resistors.

[R.G.]

Like so many other things, this was answered long ago at GEOFEX.

You'll want to read: Designing bias networks to provide Vbias in effects at http://geofex.com/circuits/Biasnet.htm

In fact you might want to read the rest of GEOFEX.

[CynicalMan]

Go read RG's article first, but for quick testing, two 47k resistors and a 10u cap from Vref to ground will almost always work. Still, if you are designing circuits to build, it's worth figuring out what you need like in the GEO article.

[blooze_man]

Thanks. I've surfed around GEOFEX quite a bit, but somehow I never saw that.