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My biggest issue is in taking FFT.. I'm trying to take a FFT for a week but not succeed. Taking FFT of this ADC is critical for me. I used so many ways, codes and toolbox.
About those glitches, they also does exist in my bits. based on my observations it is caaused by "digital error correction...
Hello guys,
I've imported digital output of a pipeline ADC, designed and simulated in hspice to Matlab, then I've converted it to an analog variable.
Have anyone experienced such glitches in this case? Any chance to have a clean output analog waveform?
Thanks @SunnySkyguy,
It was impressive, and it is, when such a long joyful journey even when nothing is not obtained, after one sunrise will reach to the true results. I'll work on, finally sharing what I've done.
Hi, dear
I'll involve these points and I'm appreciated.
Of course, input voltage range, sampling frequency and... are defined by me and design of the parts were base on such parameters.
The situation is about someone that's finishing something for first time, the project is my M.S thesis and my...
Hi dear Klaus,
Thank you,
I'm confused about where to consider as the nodes to take the FFT analysis without DAC!
That's why I've tried to use a DAC to make digital output to a known Vout to be able to take FFT, it was a wrong way
Applying input source like what you said and taking FFT from where..
What about FFT test?
Is it a good way to convert digital output code to analog using DAC to test,
Can I take a FFT test for my ADC digital output code without using DAC?
As what @crutschow refereed it's available to rebuild waveform using output codes of ADC by Computer too (MATLAB) and it is important to take a FFT test for me, of note, I've simulated my ADC by HSPICE, so:
If I want to change my mind, and rebuild it inside MATLAB and take FFT of it, how can I...
Hi, thanks Tony and thank you too Klaus,
I've assumed that it's a "simple" way as the "first basic check" that ADC conversion process is "at least working true" without any error concern.
Of course it's not necessary and I would be appreciate if you have a more general guide about testing...
I've solved my problem here and I just sharing it now, I've worked on switches, all switches must be CMOS switch or BS switch (working on 90nm tech).
Good Luck.
in the continue.. I have an issue in the design of MDAC
OTA is good enough for my requirements,it has more than 110 dB gain and 500MHz UGB (CMFB ADDED)
I've used an flip around S/H before first stage at the beginning,
I've used BS switch (well designed) to charge Sampling and Feedback capacitors...
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