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definition of dnl and inl
U just need to measure SNR, THD, SNDR and DR, and not nessary to measure INL and DNL for sigma delta modulator. and the SNR only contain noise, no need for distortion. the distortion is measure by SNDR and THD. u can use the following matlab script to exact the signal...
I think u can not put a unity-gain configuration but the real feedback netweek that u need.
Becasue the feedback factor can change the settling time.
Best Regards,
Louis
To xuedashun,
Yes, i am currently researching Discrete-Time MASH Sigma-delta modulator.
And i am looking for which kind of application (focus on communication)
is suitable for those architecture?
I am targeting spec:
60<SNR<90
1MHz<BW<20MHz.
Best Regards,
Louis
Sigma delta ADC currently achieve tens of mega Hz with high linearity.
Do you think SDM suitable for 1MHz~20MHz BW, >60dB SNR application?
Which kind topology can achieve such performance?
Continuous or discrete? single-loop or MASH? single-bit or multi-bit?
Thank and Best Regards,
Louis
Thank for ur advices.
To Syukri,
Why SAR ADC is common for communication system?
I think it is not common for communication system in IP or SoC design.
Which kind of application u consider?
To electronics_kumar,
for voice, i think ADC SNR should be at least 60dB.
and for audio, it should be...
I am currently research on ADC design which focus on communication. I have some question about the spec (SNR and bandwidth). it vary a lot form different design and application. i search in internet and have following summary:
Telecommunication (GSM,CDMA, WCDMA...)
the bandwidth and SNR/DR...
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