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

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

This Paper presents a practical way to improve signal 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 efficient techniques, would be robust to circuit non-idealities such as finite op-amp DC gain. Also, the processing timing issue in the critical paths of the proposed architecture has been relaxed due to the shifting delay of the modulator loop filter to the its feedback path. Furthermore the topology can be implemented by a fewer active blocks suitable it for low power, high operation speed aplications.