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Relaxed timing issue in global feedback paths of unity-STF SMASH sigma delta modulator architecture

Taghizadeh, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. This Paper presents a practical way to improve signal bandwidth and resolution in a Sturdy Multi-Stage Noise- Shaping (SMASH) sigma delta modulator. In this way, 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 of each stage to the its feedback path. 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. Furthermore the topology can be implemented by a fewer active blocks, suitable it for low power, high operation speed applications. © 2006-2017 Asian Research Publishing Network (ARPN)
  4. Keywords:
  5. Low-distortion topology ; Sigma delta modulator ; SMASH ; Unity STF
  6. Source: ARPN Journal of Engineering and Applied Sciences ; Volume 12, Issue 17 , 2017 , Pages 4872-4876 ; 18196608 (ISSN)
  7. URL: http://www.arpnjournals.org/jeas/research_papers/rp_2017/jeas_0917_6292.pdf