E² Pot? E-squared potentiometer? - EEV Blog #221 Doubt

[japasetelagoas]

Hey everyone,
I'm here taking my notes based on Dave's out of this world knowledge but I stumbled upon a sentence that I couldn't make sense of.

At around 14:20 minutes he says:

"Well you could get like an E squared pot or something like that. You're going to watch your maximum voltages, a lot of those, it'll only go up to 6 or, ya know, getting ones that go up 12 volts are quite rare..."

Could someone explain to me what is this E squared pot? I tried searching the web and all I got was some sort of SMD type potentiometer. I also thought about being a simple logarithmic pot but once again, I'm not really sure.

Any help would be much appreciated.

Thanks.

Link to his video:

[rstofer]

Probably a digital pot like the Xicor X9315 E²POT^tm Nonvolatile Digital Potentiometer

http://www.icbase.com/File/PDF/XIC/XIC00870106.pdf

[Kleinstein]

I don't know E - squared pots either. My guess would be a digital pot. A few have EEPROM (sometimes called E²Prom) to keep old setting. But anyway it does not work for the current shunt anyway, as those are available for a limited range (e.g. 5 K - 1 M) only. So it would be something for the µA range.

Anyway this video is more on how not to build an lab supply. It shows some of the problems, but no working solution.