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Development of low phase noise multiphase CMOS LC oscillators using analysis methods of nonlinear oscillations

Research Project

Project/Area Number 20K04482
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21020:Communication and network engineering-related
Research InstitutionUniversity of Fukui

Principal Investigator

Moro Seiichiro  福井大学, 学術研究院工学系部門, 准教授 (00303363)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords結合発振器 / 同期現象 / 多相同期 / 位相雑音 / 非線形振動論 / インパルス感度関数 / ポアンカレ写像 / パラメータ推定
Outline of Research at the Start

近年,多相信号出力が得られる発振器を用いる位相同期ループの局部発振器が高いデータレートを実現できるなど,非常に有用であることが報告されている.本研究ではVLSIへの実装と情報通信機器の局部発振器への応用を念頭に置いて提案された高周波かつ多相同期を発生させるCMOS LC発振器をスパイラルインダクタの相互インダクタンスを用いて環状に結合したシステムの位相雑音の新たな解析法および改善法を検討する.具体的には提案システムを非線形ダイナミカルシステムととらえ,従来よりも精度の高い解析手法を提案し,さらにその解析手法に基づいて低位相雑音を実現する多相同期発振器の最適なパラメータや回路構造を検討する.

Outline of Final Research Achievements

Our goal of this research is to reduce the phase noise in multi-phase CMOS LC oscillators by the methods based on the theory of nonlinear oscillation. We have proposed the numerical analysis method of the steady state periodic solution using Haar wavelet transform. By using this method, we can analyze precisely the oscillation waveforms including the parameter deviations. Also, we have proposed the parameter estimation method using Haar wavelet transform, and we can show easier way to design the circuit. Moreover, we have investigated the relationship between the limit cycle and the phase noise of the oscillators, which are based on the theory of nonlinear oacillations. From these results, the design to reduce the phase noise has been realized and we have confirmed its performance of the proposed circuits.

Academic Significance and Societal Importance of the Research Achievements

本研究で提案した多相同期CMOS LC発振回路は,高周波で動作する情報通信機器内部において,発振周波数を高くすることなく時間分解能を向上させることが期待でき,発振器単体の周波数が数GHzで頭打ちとなる中で,より高性能な機器の開発に寄与できるものと期待できる.また,発振現象や同期現象は非線形問題における代表的な現象であり,これらの理論を用いることは非線形科学の発展や,社会的意義の向上にも大きな役割を果たすものであり,本研究で得られた成果は学術的,社会的に大きな意義を持つものであると考えられる.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2024 2023 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Numerical analysis of nonlinear circuits with non-polynomial nonlinearity using Haar wavelet transform2024

    • Author(s)
      Shitanaka Haruto、Morinaga Yudai、Moro Seiichiro
    • Journal Title

      Journal of Advanced Simulation in Science and Engineering

      Volume: 11 Issue: 1 Pages: 116-124

    • DOI

      10.15748/jasse.11.116

    • ISSN
      2188-5303
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] ハールウェーブレット微分演算子行列を用いた2階偏微分方程式の数値解析2023

    • Author(s)
      佐野響,前川拓海,茂呂征一郎
    • Journal Title

      電子情報通信学会技術研究報告

      Volume: 122 Pages: 25-30

    • Related Report
      2022 Research-status Report
  • [Journal Article] Analysis Method of Unstable Periodic Solutions in Autonomous Nonlinear Circuit Using Haar Wavelet Transform2021

    • Author(s)
      山本 崚太、高松 航平、中林 達哉、茂呂 征一郎
    • Journal Title

      電子電子情報通信学会論文誌A 基礎・境界

      Volume: J104-A Issue: 10 Pages: 214-222

    • DOI

      10.14923/transfunj.2020JAP1028

    • NAID

      120007164960

    • ISSN
      1881-0195
    • Year and Date
      2021-10-01
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A method to find periodic solutions in nonautonomous nonlinear circuits using Haar wavelet transform2020

    • Author(s)
      Moro Seiichiro、Takamatsu Kohei
    • Journal Title

      Nonlinear Theory and Its Applications, IEICE

      Volume: 11 Issue: 4 Pages: 561-570

    • DOI

      10.1587/nolta.11.561

    • NAID

      130007921437

    • ISSN
      2185-4106
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Numerical analysis of nonlinear circuits with non-polynomial nonlinearity using Haar wavelet transform2023

    • Author(s)
      Haruto Shitanaka, Seiichiro Moro
    • Organizer
      The 42nd Annual International Conference on Simulation Technology
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Parameter estimation of nonlinear circuits using Haar wavelet transform2020

    • Author(s)
      Sakaguchi Kazuya、Moro Seiichiro
    • Organizer
      International Symposium on Nonlinear Theory and Its Applications (NOLTA 2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] ハールウェーブレット変換を用いた2階偏微分方程式の数値解析2020

    • Author(s)
      前川拓海,茂呂征一郎
    • Organizer
      2020年度電気・情報関係学会北陸支部連合大会
    • Related Report
      2020 Research-status Report
  • [Presentation] ハールウェーブレット変換を用いた非線形回路のパラメータ推定2020

    • Author(s)
      阪口和哉,茂呂征一郎
    • Organizer
      2020年度電気・情報関係学会北陸支部連合大会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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