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This part would be quite simple. You could control it with a DAQ card. You could also control the SPI versions with a DAQ card, just a little more software overhead. http://products.analog.com/products/info.asp?product=AD5220 Kurt

Thanks for the advice, and now I have other question if anyone can answer. I'd perfer to design the input section with a 10 Meg input impedence but didn't really want to design it with descrete FETs etc. to get a relatively high BW around 250 - 500KHz. Does anyone know of any neat ways to maybe...

I've done a little seaching the web for info on designing digital oscilliscopes and haven't found anything helpful. Can anyone tell me where I could look for information that is "the way it's done today" technology. I'm curious of any pro/cons of using a digital pot for the...