interpolator filter design!!need instructions!!!!

[ls000rhb]

interpolator filter design for simga-delta DAC !!need instructions!!!!
anyone have some Hdl RTL code for interpolator filter ???i very need now!!!
Thank!!!

 

[mahdithdn]

Hi
I don't that it's useful or not. but in matlab there is a function "resample" that can be used for interpolation.
it seems to be possible, if you can convert it (automatically) to VHDL or Verilog.

regards

 

[ee_expert2000]

rememvber that, for interpolation, you should first upsample the data by the MATLAB upsample function.
then you have to remove the images by a LP filter.
based on your design requirments, you can design the filter to keep one basebad image.
you can do theses using simulikn blocks so that you can ger the VHDL code for the FPGA also.
in simulink there are both upsample and filter realization blocks in the signal processing toolbox.
hope this helps.