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

[Neil Johnson]

Hi David,

>> 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?

Its nice and simple, and I believe has a number of distinct  
advantages to it over the usual saw core.

Cheers,
Neil
--
http://www.njohnson.co.uk