[sdiy] Yusynth VCO

[cheater cheater]

Thanks for the link

D.

On Mon, Apr 5, 2010 at 16:47, Ian Fritz <ijfritz at comcast.net> wrote:
> At 12:05 AM 4/5/2010, David G. Dixon wrote:
>>
>> > > I get a different result, though.  I must be misunderstanding
>> > > something.
>> > >
>> > > The fractional frequency change per degree is 2.27 / 881 or .26% or
>> > > 2600ppm/K, is what I get.
>> > >
>> > > What am I missing?
>>
>> > You are looking at it linearly instead of exponentially.
>
> No. I am calculating the log derivative. This is simply the definition of
> temperature coeficient:
> TC = (1/f)(df/dT) = (d/dT)log f
> Please refer to my website for how these calculations are done:
> http://home.comcast.net/~ijfritz/sy_cir7.htm
>
> Ian
>