Noise induced synchronization of MEMS resonators and its application to functional circuits

• Project/Area Number: 17K14685
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Communication/Network engineering
• Research Institution: Ritsumeikan University
• Principal Investigator: Ishimura Kazuyoshi 立命館大学, 理工学部, 助教 (50779072)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 雑音 / 振動子 / 同期 / MEMS振動子 / 水晶振動子 / 水晶発振回路 / MEMS発振回路 / アーノルドの舌 / 同期現象 / 雑音誘起位相同期 / MEMS

Outline of Final Research Achievements

We developed the elemental technologies for synchronization phenomena using a crystal unit with mechanical vibrations, which is represented by an equivalent circuit of a MEMS resonator. Synchronization phenomena of a group of noisy, non-interacting quartz resonators and their behavior during coupling synchronization are analyzed from the resonance frequency characteristics. Recent advances in semiconductor technology have made it possible to obtain general-purpose MEMS resonators at a low cost. In the future, we will be able to shift to the construction of synchronization technology for MEMS resonators using this technology.

Academic Significance and Societal Importance of the Research Achievements

現在の半導体産業は、素子の微細化や回路技術の発展などにより進歩を遂げてきた。その中で、素子サイズの物理的限界や、除去が困難な雑音などの問題が生じ、従来と異なるアプローチが求められている。一方で生物は、雑音を積極的に情報処理に利用することが知られている。このような雑音を利用する情報処理機構の開拓が、半導体産業の現状を打破する新たなアプローチの一つになると考えられる。

Research Products

• [Journal Article] Limited Effect of Noise Injection on Synchronization of Crystal Oscillators (2020)
  • Author(s): Ishimura Kazuyoshi、Tokuda Isao T.
  • Journal Title: Journal of Circuits, Systems and Computers Volume: 29 Issue: 02 Pages: 2050026-2050026
  • DOI: 10.1142/s0218126620500267
• [Journal Article] Synchronization of Two Coupled Crystal Oscillators (2018)
  • Author(s): Inden Ryota, Ishimura Kazuyoshi and T. Tokuda Isao
  • Journal Title: Journal of Signal Processing Volume: 22 Issue: 4 Pages: 147-151
  • DOI: 10.2299/jsp.22.147
  • NAID: 130007419007
  • ISSN: 1342-6230, 1880-1013
  • Year and Date: 2018-07-25
  • Peer Reviewed
• [Presentation] Simple mathematical model for Pierce oscillator circuit: Simulation and experiment (2019)
  • Author(s): Naoto Komeno, Ryota Inden, Kazuyoshi Ishimura and Isao Tokuda
  • Organizer: RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing 2019
  • Int'l Joint Research
• [Presentation] Noise-enhanced coherence of crystal oscillation (2018)
  • Author(s): Kazuyoshi Ishimura, Ryota Inden and Isao Tokuda
  • Organizer: The 2018 International Symposium on Nonlinear Theory and Its Applications
  • Int'l Joint Research
• [Presentation] Synchronization of two coupled crystal oscillators (2018)
  • Author(s): Ryota Inden, Kazuyoshi Ishimura and Isao T. Tokuda
  • Organizer: NCSP2018
  • Int'l Joint Research
• [Presentation] Noise-Induced Synchronization of Pierce Oscillators (2017)
  • Author(s): Kazuyoshi Ishimura, Ryota Inden and Isao T. Tokuda
  • Organizer: NOLTA2017
  • Int'l Joint Research