[sdiy] Help with sawtooth convertor

Oren Leavitt obl64 at ix.netcom.com
Fri Jan 4 03:27:21 CET 2019

On 1/3/19 8:14 PM, Tim Ressel wrote:
> Hi,
> Once again my ignorance bites be. I have a triangle to saw convertor 
> that works very well:
> https://imgur.com/a/CutQtVC
> But the DG448 is smt (and  pricey) and I need a pth solution. The 
> DG448 is just shorting the op amp pin to ground. I have seen circuits 
> using npn transistors and stuff like 2N7000 but I cannot get that to 
> work. The signal at that spot is up to +/- 10 volts. Does anyone know 
> how to do this?
> Thanks!
I would think a standard n-channel JFET would work if given voltage 
levels on the gate.

- Oren

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