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Re: Sigma-Delta Modulator in Fractional-N frequency synthesi
Thanks for your reply
Because I don't know how to realize a full adder and register in simulink. So I set up a MASH1-1-1 model with 1/z module based on the theory Z domain transfer map.
And I add Band limited white noise, or repeating...
Very good topic, and I learn a lot from your discussion.
dear rfsystem
I wonder how you get the conclusion the spur pops up in the frequency range where the PLL analog filter does not filter!
Is it fref*1/256 < bandwidth of LPF ?
dear swicap
If with a traditional MASH1-1-1 structure, how...
mash1-1-1
dear all
I am a green hand in simulink. I want to set up a sigma delta modulator in simulink
I planed to make it in a digital way, that is to say, I will need a multi-bit full adder , a multi-bit register and a single bit register.
I searched the tool box, but I don't think there is...
plls and simulink
Well
does any one have a FNPLL simulink model?
I am trying to work on it. And I want to set up with a MASH1-1-1 SDM.
As the output has eight levels, I wonder how can it work as
Fout=fref * (k*(N+1)+(F-K)N)/N=fref*(N+K/F)
I mean how to make the output levels work with the right...
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