VCO from Harris 8038 ic? or Exar xr2206 ?

[Gene Zumchak]

Kip,

    The 8038 has possibilities.  There's a better one, MAX38.
Unfortunately, these chips were intended to be used with a resistor for
frequency control.  It may be possible to use it by feeding a current
source into one of the terminals where the resistor is attached.  I
haven't looked at the schematic for a long time.  The nice thing about it
is that it generates a Sine if I'm not mistaken.  The not so nice thing is

that it has no sawtooth, although you could get one with a little work
from the triangle.  Maybe some others have experience with this chip.

Gene Zumchak (I'm new on the list)



Kip Chatterson wrote:

> Hi all,
>
> I just was browsing thourgh the digikey catalog and found the 8038 for
> $4.20 a peice.
> Will they work with good performance as a vco?
>
> I would love to see a good design using this chip.
> This seems like a good price?
>
> I also stumbled on the xr2206. It was not in the catalog but I am
> interested in it too for vco construction...
>
> comments?  Please no flames for my writing style.
>
> Newbee at this....thats me!
>
> Kip
> Thanks much
> Kip
> -73 de K5KIP