Thanks for your replies.
& Vivek, yes i am talking about Oversampled DACs.
Quote:And yes, randomization is used fairly often in DACs to improve SFDR. PRBS-based dithering is quite popular in most cases as the spurs are removed from the entire spectrum, albeit at the cost of a raised noise floor (so if you can afford the higher noise floor). In oversampling DACs, there are various methods used for data-dependent scrambling, although I am not sure if there is any industry standard so to speak.
Could you guys provide me some references on PRBS ??
Quote:Mayank, I thought about it and most likely the best solution is to use dither like Vivek suggested. It is easy to build a PRBS and then you don't have to worry about spending time chopping up your current cell array.
Dither can be introduced in SDM also along with Randomization. Based on your experiences, you are saying PRBS should give better SFDR than Δ-Σ Randomization/Chopping of current cells as you say. ??