VCO

[BJ]

Lately I have made two different VCO's for
driving a wave table, 7bit in length.
The first using a LM331/4151 V/F IC.
this one have extra nice linearity but are
problematic to run at the high frequency that's needed.

The other one are the basic now familiar LM311
comparator and 3140 integrator.
This VCO can run at slightly higher frequency 
but I am suspicious about the linearity of the VCO
at those frequencys.

In both cases the integrator are LF353 instead.
Please, feel free to suggest another OPamp for
high freq usage as a integrator.
Do you feel that the input impedance of the integrator
may do several degration to the high frequency upper limit?

All of you who have made a VCDO and not using aCEM3340
tell me about the design of yours an what kind of components
you use to make the driver VCO for the wave table.
I'm not talking about a PLL but rather a high(100Khz and above)
freq VCO,temp stable,and high linear scale VCO for 1V/Oct use?
If you have a clever PLL design tell me about it to.
(Not to many components)
Does any one have a good ide'a on this issue, so lets hear it now!

BJ in smorgas board country....

PS: Was I and Barry Klein the only people on the list
who liked my tip on the PDF writer that you get for free
from the Linear Tech CD rom,you,,,, ego,lazy people,,,
not a single respond on that mail did I get! shame on YOU..

YOU,,stand up and say this loud and clear:
I'm a modular nerd,,Im so sorry BJ,