Applying ADC on DE1

Sorry I'm just a beginner so I can't be helpful to you. Anyway Cyclone II (it's placed on the DE1 board right?) support LVDS signals so I think it's possible to use LVDS as ADCs as described in the link you gave me.

you can find more infos about sigmadelta on wikipedia:

http://en.wikipedia.org/wiki/delta-sigma_modulation

or try this tutorial by analog device:

http://www.analog.com/static/imported-files/tutorials/mt-022.pdf

http://www.analog.com/static/imported-files/tutorials/mt-023.pdf

because of I'm interested in applying a ADC to my board (DE0) too, if you can get results, can you share with me? :)

regards

GP