Self-Dithered Digital Delta-Sigma Modulators for Fractional-N Frequency Synthesizers

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概要

• 論文の詳細を見る

• Digital delta-sigma modulators applied in fractional-N frequency synthesizers suffer from spurious tones which undermine the synthesizer's spectral integrity. Major conventional solutions include initial condition setup, structural modification, and dithering. For the first one the effectiveness is limited, while for the latter two, extra design effort and hardware overhead are required. In this paper, we propose a novel dithering method with simple implementation and no hardware overhead while achieving effective spur elimination. This method is implemented on MASH and single-loop DDSMs. Simulation results compared with conventional solutions prove its effectiveness.

• 2010-07-15

著者

• Xu Zule

  Tohoku University, Research Institute of Electrical Communication

• Lee Jun

  Tohoku University, Research Institute of Electrical Communication

• Masui Shoichi

  Tohoku University, Research Institute of Electrical Communication

• Lee Jun

  Tohoku University Research Institute Of Electrical Communication

• Xu Zule

  Tohoku University Research Institute Of Electrical Communication

• Masui Shoichi

  Tohoku University Research Institute Of Electrical Communication

• Masui Shoichi

  Tohoku Univ. Sendai‐shi Jpn

• Lee Jun

  Tohoku University

• Xu Zule

  Tohoku University

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