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Junior Member level 3
Hi,all
I have designing a 2-2 cascaded sigma delta ADC, now a problems puzzled me so much, that is why the SNR filtered with a 5 order comb filter is much more larger than that be filtered before, it can be seen from the bode plot in matlab directly,especially in baseband. everyone knows it is not possible at practise. so ,
holp for help,thanks!
The data using to computes snr comes from spectre simulation results,and, i utilize matlab as tool, the comb filter is describe as
>> b=ones(1,64);
>> a=[1];
>> fout1=filter(b,a,fin);
.......
regards
:|
I have designing a 2-2 cascaded sigma delta ADC, now a problems puzzled me so much, that is why the SNR filtered with a 5 order comb filter is much more larger than that be filtered before, it can be seen from the bode plot in matlab directly,especially in baseband. everyone knows it is not possible at practise. so ,
holp for help,thanks!
The data using to computes snr comes from spectre simulation results,and, i utilize matlab as tool, the comb filter is describe as
>> b=ones(1,64);
>> a=[1];
>> fout1=filter(b,a,fin);
.......
regards
:|
