hi peroly, thank you for your advices. i have measured the INL/DNL using sinewave histogram method, and a ramp input method is impractical because of high resolution.
Added after 7 minutes:
samvelc said:
jiangxb said:
hi
i have design a 20-bit sigma-delta adc, and now i want to measure its integral linearity error and no missing code, how to do?
it looks like be impossible to use feedback loop or histogram testing because of high resolution.
Hi jiangxb,
I need to design multi-bit adc, too. But I haven't big experience in this field.
Could you help me??? Do You designed it by SPICE, or MATLAB, or ... ???
Thanks.
you mean multi-bit feedback sigma-delta adc? i havn't try it because of the nonlinearity of feedback dac.
i use matlab for system-level simulation and spectre for transistor-level simulation.