Problem with pipeline ADC harmonics

[zouyufeng]

If design is perfect , whether even harmonic is contracted in spectrum figure of the pipepine ADC with diferential S/H circuit?


Appendix is my spectrum figure of pipeline ADC.

Besides fin=0.1MHz, spectrum,In 0.2,0.3,0.4,0.5.......2MHz, is quantization error or harmonics?

please help me!!!thank you!!!

[/code]

 

[pfd001]

About pipelian ADC!

if it is a simulation result, maybe your step is too large

 

[zouyufeng]

Re: About pipelian ADC!

what is'step is large'? fin=0.1M, fs=4M,this is not large! Can you clearly!

Thank you!

 

[zouyufeng]

Re: About pipelian ADC!

this result obtained by matlab! no relation with step!!!?/?

 

[benchen]

Re: About pipelian ADC!

I think Fin and Fsample shoudl satisfy:
fIN / fSAMPLE = NWINDOW / NRECORD,
fIN: Periodic input signal
fSAMPLE: Sampling/clock frequency of the ADC under test
NWINDOW: Integer number of cycles1 within the sampling window, prime number
NRECORD: Number of data points in the sampling window or FFT