J
Jamie
- Jan 1, 1970
- 0
Joerg said:In case someone else is in a similar situation, I've just discovered two
interesting alternatives if no suitable DDS module can be found. The 1st
is ye olde XR2206 which I thought had gone unobtanium:
http://electronics-diy.com/product_details.php?pid=537&name=1Hz - 2MHz XR2206 Function Generator Kit
The 2nd solution is rather ugly. I could take these DDS modules and
replace the oscillator with a LTC resistor-set silicon oscillator. Those
can be current steered. Of course then the digital frequency display of
the module would become fairly meaningless but could still sort of
signal if my PID loop has locked or not.
If you want to get that crude, you could always turn to an old stand by..
LM566
That has a square out that you can use to monitor in a counter for
example and a triangle out that you can wave shape into a sine wave.
That also includes a modulation input pin and it just happens
to be in your range.
Jamie