A novel SMASH Sigma-Delta Modulator architecture for low-power broadband applications

This Paper presents a practical way to improvesignal bandwidth and resolution in a Sturdy Multi-Stage Noise-Shaping (SMASH) sigma delta modulator. The proposed Unity-STF SMASH architecture, which is realized with several efficienttechniques, would be robust to circuit non-idealities such as finiteop-amp DC gain. Also, the processing timing issue in the criticalpaths of the proposed architecture has been relaxed due to theshifting delay of the modulator loop filter to the its feedbackpath. Furthermore the topology can be implemented by a feweractive blocks suitable it for low power, high operation speed.

کلیدواژه ها:

Sigma Delta Modulator ، SMASH ، Unity STF ، lowdistortiontopology