[sdiy] Which is better as a VC resistor? FET or BJT?

[lanterma at ece.gatech.edu]

On Jun 30, 2011, at 12:23 PM, Scott Gravenhorst wrote:

> H11F series (H11F1, H11F2, H11F3) is a FET optoisolator that might be
> useful as a VC resistor.  I cannot speak to linearity, but it's source
> need not be connected to ground.


I had a student build a Buchla lowpass gate with these in place of the vactrols. The student needed to change the capacitors, since the resistance range of the FET optoisolators was different than that of the vactrols. It sounded pretty cool, I thought.

- Aaron