[sdiy] Voltage references in VCO

[scottnoanh at peoplepc.com]

René Schmitz wrote:
> In essence a voltage reference, an opamp, comparator or any other
> component has its own noise, some of that with so low frequencies that
> we can measure it on a timescale that aproaches minutes or even days or
> weeks.

Some can be measured in terms of Coffee Breaks! =0)

Ian Fritz wrote:
>I just hate slow tuning drift.  In fact I think I hate it as much as Harry
hates >B**s.

Harry Bissel an apiophobe?  I doubt it; if one looks closely, one can see
his beard actually consists of honeybees, not human hair.  =-D

Seriously, one function that works well for a bit of non-annoying
instability is the Fluctuating Random Voltage function from the Buchla 266
SOU, set for least probability of change and attenuated down to barely a
whisper's effect on the VCO.

Cheers,
Scott