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Y(z)=[U(z)-V(z)*z^(-1)]/[1-z^(-1)]
if the gain is different
Y(z)=[U(z)*gain1-V(z)*z^(-1)*gain2]/[1-z^(-1)]
as gain1=gain2=1, u can get the structure of this figure
a pulse source includ all range frequency. after this filter, signal in band will be lose. so, u can get the freq-domain character.
the most simply method is get the output data of a 'tran' analysis with a pulse source.
sample use the clock frequency. then do FFT analysis to those data after sample.
It's not a continues circuit! so u cann't use AC analysis.
If u have spectre, u can use PSS & PAC to simulate.
give a pulse source, get enough tran analysis data. sample and FFT at MATLAB.
so u can get the freq-character about this filter.
veriloga adc delta sigma
I'm also begin a SDM ADC now.
Matlab & Spectre are enough, I think.
U need to know the z-domain model about SDM at first.
And begin from the simplest structure is a good choice. Such as a 2nd Order SDM.
We usually realize the z-domain model by switch capacitor...
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