[sdiy] Results of Tempco test of Temp Compensated VCO

patchell patchell at silcom.com
Sun Feb 2 03:43:19 CET 2003


    Well, I just reduced the data I took today (used a least squares
fit), and unfortunately, the results don't seem realistic (I will have
to go back and check my arithmatic).  Looks to me like the tempco is
1.7ppM/C, but that is utterly rediculous.  Here is the equation I got
from the least square analysis:

Scale(V/oct) = 0.00000174 * Temp(C) + 0.999384;

The 0.999384 would be the scale factor at 0 degrees C if V/oct....

    Still, the VCO seems to be well compensated now...it has been a long
road there, and would have never gotten there without this group.

--
 -Jim
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