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Analyzing Gain Calibration Control loop

Started by kaung 1 week ago93 views

Hi All,

I'm a DSP newbie trying to get myself more familiar with convergence algorithms and DSP in general. I've come across an article on gain calibration for time-interleaved ADCs (article name: calibration and dynamic matching in data converters). Particularly, I'd like to understand how I can mathematically analyze the block diagram in the picture below (Figure 3). I can simulate it in Simulink and see that it is doing what it's supposed to be doing but I am not sure how I can prove G = 1/(GD*GA) analytically. Also, the multiplication between the dither signal and Dout followed by an accumulator to produce G is a little bit beyond my understanding.

Also, please feel free to point me towards any books/materials. My end goal is to become comfortable and develop a strong intuition and understanding of systems like these. Any help/guidance is greatly appreciated!

gain_cal_ss_77380.png


Best Regards,

Kaung