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[SOLVED] Overflow of integrator in CIC filter

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I'm still missing a consistent description of the problems you are observing:
But what I am facing right now is,
Simulation: works great
Experiment(when I downloaded the system to the FPGA) : does not work
Click to expand...

Referring to the simulation result (got from ModelSim), all the output signals except from comb part is correct.
Only the comb output is wrong.
Click to expand...

I think posting the actual CIC code and test bench is the best way to make the problem understandable. Preferably as appended files.
 

Dear FvM and phongphanp,


Thank you two.

I found CIC filter itself was working fine.
But the main purpose of realizing delta sigma ADC is not still solved.
I posted a new thread about it so please help me there.

I appreciate your help.


Best regards,

Yukihiro Hatagishi
 

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