Electronics > Projects, Designs, and Technical Stuff

Oscilloscope ASIC Kickstarter instead of Open scope.

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filssavi:

--- Quote from: OwO on January 09, 2020, 09:23:38 am ---Above 2Gsps forget it. One channel of desktop DDR3 connected to a Kintex 7 can probably manage 2GB/s reliably (and 4GB/s peak), but any more and you won't be able to do it within reasonable cost with off the shelf parts. Triggering is not very hard and doesn't take much FPGA resources to implement.

--- End quote ---

The Zynq Ultrascale (MPSoCs) the PS alone (hardware memory controller) support up to DDR4-2400 for a theoretical maximum bandwidth of ~20GB/s, you could also implement an additional DDR controller in the PL and get even higher bandwidth,

From trenz you can even get an off the shelf module with 4GB of DDR4 and a almost 300k LUTs for considerably under 1000 € in 1k quantity, and I'm shure that with higher volumes and dealing directly with Xilinx would get you a good deal on the IC's themselves

OwO:
So the OP is targeting a retail price around $200 which means a total BOM cost under $80. Zynq-7010 is probably the best you are going to get if you want to leave enough room for the ADCs and front end. At this price I say 1Gsps is realistic and you may undercut Rigol, just maybe with no display.

filssavi:
I had completely missed the targeted price-point  |O |O

In that case I completely agree with you, and also the use of an ASIC is even more unlikely, unless he intends to ship milions of the thing

ogden:

--- Quote from: OwO on January 09, 2020, 10:05:12 am ---So the OP is targeting a retail price around $200 which means a total BOM cost under $80. Zynq-7010 is probably the best you are going to get if you want to leave enough room for the ADCs and front end. At this price I say 1Gsps is realistic and you may undercut Rigol, just maybe with no display.

--- End quote ---
Right. Result will be "scope" in form of bare PCB with no enclosure, no screen, and .... no firmware/software. This is just one of those daydreaming projects "let's make XYZ because BOM of PCB cost virtually nothing" :)

OwO:
You know, if someone manages to put out a 1Gsps scope for less than $50 it'll probably sell pretty well even with very rudimentary software. A waveform display, maybe a bit of zooming, some basic triggers, etc. I could write the software and firmware in two weeks. But getting the ADCs and Zynq for that cheap is a bit of a stretch. Might be possible with chinese ADCs, I'll look into it.

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