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teho AWG: open source arbitary waveform generator

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teholabs:
I am designing an AWG/function generator that will be open source hardware. There will probably be a kickstarter for it when the design is done. Already working on prototypes, I see it as falling along the lines of a Rigol DG1022 or Agilent 33210A.

I also noticed the long thread on the Hantek DDS, I think my design will have lower jitter and exceed that box in several other ways.

I am curious though as to what features the maker/hacker community here would find highly desirable. Cost, final features all still to be determined for sure, I figure it is best to get input before a lot of money goes to prototypes. If there is any price you feel it is essential to keep such a design under I'm all ears on that also.

amspire:
Good luck.

Just be aware that there are lots of cheap Analog Device IC-based function/waveform generator boards available at places like Aliexpress.com in various states from a simple $15 basic board to ones perhaps to $100 with SMA connectors, display and buttons. They are usually dual channel and top frequencies over 100MHz are available.

You will have to be offering something better then these boards. Better packaging, better output amp, better controls, better performance or better communications with a PC.

Richard.

Rerouter:
For me:
- the ability to drive high level outputs such as +-10V across the entire frequency rance,
- 0 Starting, so you can work down to 1 or 0.5Hz
- Variable Current limit, On more than one project i have seeked to limit the maximum current the AWG can source and sink, (sometimes at different values but thats not really neccesary)

teholabs:

--- Quote from: amspire on April 21, 2012, 05:46:27 am ---Good luck.

Just be aware that there are lots of cheap Analog Device IC-based function/waveform generator boards available at places like Aliexpress.com in various states from a simple $15 basic board to ones perhaps to $100 with SMA connectors, display and buttons. They are usually dual channel and top frequencies over 100MHz are available.

You will have to be offering something better then these boards. Better packaging, better output amp, better controls, better performance or better communications with a PC.

Richard.

--- End quote ---

It is mostly for myself so it doesn't really matter what else exists. People seemed pretty excited here 25 pages for the AWG I mentioned and mine should be significantly better and open so we will see... Most of the cheap things I have seen (very cheap) have just been DDS not AWG. But feel free to point me at something if you like specific you think is a great option.

teholabs:

--- Quote from: Rerouter on April 21, 2012, 05:53:15 am ---For me:
- the ability to drive high level outputs such as +-10V across the entire frequency rance,
- 0 Starting, so you can work down to 1 or 0.5Hz
- Variable Current limit, On more than one project i have seeked to limit the maximum current the AWG can source and sink, (sometimes at different values but thats not really neccesary)

--- End quote ---

Current compliance eh? I'm not sure how you would do that with a very fast circuit. I'll have to think about it. As far as short circuit protection it will have that. As far as you blowing it up if you attach some large voltage to the output I guess I should make allowance for that, the allowance may be you have to change an opamp... No matter what I do if you put a large enough voltage on the output it will blow up if that is your issue.

Current idea should do +/- 10 into high-Z +/- 5 into 50 ohm (50 ohm output Z).

Frequency ranges TBD. Sample depth should be around 16 Kpts.

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