ComputerVoltageSources

Whoops - missed the last thought on serially
programmable frequency generators. That's a good one.

I have used an Analog Devices AD9851 DDS in a
PIC-based frequency source. The 180MHz output range is
probably overkill, and it only has a sine output.

There is the following chip though:

http://www.analog.com/en/prod/0,,770_843_AD9833%2C00.html

which has sine/tri/sq outputs and is serially
programmable. Fairly inexpensive and while
surface-mount it does have exposed leads so it would
be hand-solderable. ADI is pretty good people and they
have been known to be generous with the free
samples...

Eric

--- Grant Richter <grichter@...> wrote:

> I still wish we could put a little noise chip on the
> CVS board
<snip>
> Maybe a frequency 
> synthesizer with an SPI programming port?


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