Self-Dithered Digital Delta-Sigma Modulators for Fractional-N PLL

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概要

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• Digital delta-sigma modulators (DDSMs) applied in fractional-N frequency synthesizers suffer from spurious tones which undermine the synthesizers spectral purity. We propose a solution featuring no hardware overhead while achieving equivalent spur elimination effect as using LFSR-dithering. This method can be implemented on MASH and single-loop DDSMs of 3rd- and 2nd-order.

• 2011-06-01

著者

• 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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