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chili-chips-ba / openCologne

Spicing up the first and only EU FPGA chip with a flashy new board, loaded with a suite of engaging demos and examples. https://www.chili-chips.xyz/open-cologne
https://nlnet.nl/project/openCologne
BSD 3-Clause "New" or "Revised" License
46 stars 2 forks source link

PCB PMOD Request: Low-noise 50MHz+ multi-channel OpAmp (anaIO) #5

Open chili-chips-ba opened 5 months ago

chili-chips-ba commented 5 months ago

In order to support our 99% digital, DSP-based Sigma-Delta ADC and DAC IP cores, we need two board-level analog OpAmps.

The objective is to offer an on-demand, easy-to-use ADC/DAC solution for CologneChip FPGAs, implemented in simple, affordable, minimal set of external analog components, yet boasting unusually good specs.

While most of the secret sauce is in the DSP algorithms and tradeoffs between sampling rate, throughput and precision, i.e. custom-tailoring the filtering and averaging functions to the specifics of the use case, this very thin external analog layer must be on par with our digital cores, and contribute to the quality of the total solution.

@DadoCCAG shall provide additional guidance and requirements wrt the selection of this important external component...

chili-chips-ba commented 3 weeks ago

@TarikHamedovic could you please add your input here regarding external electronics you've built for Sigma-Delta ADC, as well as radio receiver.

TarikHamedovic commented 2 weeks ago

You can view the explanations, schematics and pictures here on the Wiki page.

For the radio reciever, this is the github repo

This is the schematic:

image

This is the PCB layout of the simple board I made:

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And the 3D view of it:

image