[sdiy] Zener clipping Was : ...that 1K resistor on the output

[David G. Dixon]

> Oh, you mean like in the auxiliary oscillator in my three-phase LFO?
> 
> http://www.milton.arachsys.com/nj71/pdf/cesyg/vclfo-sch.pdf
> 
> The back-to-back zeners are D11 and D12 around comparator IC5A.  They
> clamp the output of the comparator and set the input current into the
> integrator IC1C / IC6A.

Yep, that's it!  How do you like it?  What do you think about this as the
basis of an actual precision VCO?