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FPGA / Re: Analog video output with FPGA ?
« Last post by Jaunedeau on Today at 06:03:16 am »Didn't you say DAC, not ADC?
The idea is to have both and ADC and a DAC, and use the ADC to calibrate the DAC and build a lookup table to correct the DAC errors. I've found a post about this idea ( https://www.eevblog.com/forum/projects/r-2r-ladder-dac-calibration-what-do-you-think/ ) and when you see the first oscilloscop capture, it seems possible to make a calibration table and get a good 14bit adc from this 16bit R2R adc after calibration.
My case is a bit different : I need 8bit not 16, but about 30Msps not 44ksps. Also since my input is discrete (e.g. the atari 2600 has a 128 colors palette), I could build a calibration table for the 128 RGB triplets instead of three calibration tables of 256 individual R, G and B and compensate for the crosstalk.
I am a software developer, only learning electronics as a hobby, I have no intuition of if this could be a good solution (to the problem of video ADCs eventually no longer be available in a few years, and cost reduction because cost reduced projects are more fun to me).