Re: multi bit quantizer in matlab
Hi Bob_lv,
Not sure if you will see this post, since it seems posted pretty long time ago.
I have difficulty to implement a delta sigma type of PLL:
I need 20.625 divide ratio, so I plan to divide VCO frequency first by 10, and then use div2/3 dual modulus divider.
3 stage classic MASH structure is used, and I simulated in simulink, noise spectrum looks fine (with added small dither).
The output of the modulator is within the range of -4 ~ 4, now the question is how to use this info to control dual modulus divider? or should I use multi-modulus divider?