Development of low power and wide band 12 bit ring DCO

• Project/Area Number: 20760224
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Electron device/Electronic equipment
• Research Institution: Kyushu University
• Principal Investigator: POKHAREL R.K. Kyushu University, 日本エジプト科学技術連携センター, 教授 (60398568)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: デジタル整合発振器 / リコンフィギュラブルRFフロントエンド / CMOSプロセスによる高周波集積回路 / 低消費電力 / マルチバンド無線システム / マルチバンド無線通信 / リタンフィギュラブルRFフロントエンド / リング型DCO / フィボナッチ数列 / 位相雑音 / 超広帯域 / 無線通信 / RFCMOSフロントエンド / デジタル制御発振器 / 低雑音

Research Abstract

A 14-bit digitally-controlled oscillator on ring topology was proposed and implemented on 0.18 mm CMOS technology. The fraction-based series, also known as Fibonacci series was employed to optimize the transistors size in a five-stage ring topology and negative skewed delay technique was used to further increase the frequency tuning. As a result, the prototype DCO demonstrates a measured frequency range up to 4.2 GHz. The proposed DCO with wideband tuning with low frequency tuning step will ease the design of an inductorless reconfigurable ADPLL for wireless transceiver where the phase noise is not strict.

Research Products

• [Journal Article] Low phase noise, high switching speed digitally controlled ring oscillator in 0.18 um CMOS complementary metal oxide semiconductor (2011)
  • Author(s): A.Tomar, S.Lingala, R.K.Pokharel, H.Kanaya, K.Yoshida
  • Journal Title: Japanese Journal of Applied Physics article ID:04DE10 vol.50, no.4
  • Peer Reviewed
• [Journal Article] Low phase noise, high switching speed digitally controlled ring oscillator in 0.18 um CMOS complementary metal oxide semiconductor (2011)
  • Author(s): A.Tomar, R, K.Pokharel, et al.
  • Journal Title: Japanese Journal of Applied Physics Volume: 4(In press)
  • Peer Reviewed
• [Journal Article] Low phase noise, 18 kHz frequency tuning step, 5 GHz, 15 bit digitally controlled oscillator in 0.18 um CMOS technology (2010)
  • Author(s): R.K.Pokharel, et al.
  • Journal Title: Trans.of IEICE Volume: E93-C, no.7 Pages: 1007-1013
  • Peer Reviewed
• [Journal Article] Low noise wide tuning range quadrature ring oscillator for multi-standard transceiver (2009)
  • Author(s): O.Nizhnik, R.K.Pokharel, H.Kanaya, K.Yoshida
  • Journal Title: IEEE Microwave and Wireless Components Letters vol.19, no.7 Pages: 470-472
  • Peer Reviewed
• [Journal Article] Low noise wide tuning range quadrature ring oscillator for multi-standard transiever (2009)
  • Author(s): O.Nizhnik, R.K.Pokharel, 他
  • Journal Title: IEEE Microwave and Wireless Component letters 19 Pages: 470-472
  • Peer Reviewed
• [Presentation] Digitally controlled ring oscillator using fraction-based series optimization for Inductorless reconfigurable all-digital PLL (2011)
  • Author(s): Ramesh K.Pokharel, S.Hamada, A.Tomar, S.Lingala, P.Nuroho, H.Kanaya, K.Yoshida
  • Organizer: 11^<th> Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF, RWS 2011) pp.69-72
  • Place of Presentation: Phoenix, USA
  • Year and Date: 2011-01-17
• [Presentation] Digitally controlled ring oscillator using fraction-based series optimization for Inductorless reconfigurable all-digital PLL (2011)
  • Author(s): R.K.Pokharel, et al.
  • Organizer: 11^<th> Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF2011)
  • Place of Presentation: フェニクス(米国)
  • Year and Date: 2011-01-17
• [Presentation] Digitally Controlled Ring Oscillator for Multi-Standard GHz Applications (2010)
  • Author(s): A.Tomar, R.K.Pokharel, et al.
  • Organizer: 2010 International Conference on Solid State Devices and Materials (SSDM2010)
  • Place of Presentation: 東京(日本)
  • Year and Date: 2010-09-23
• [Presentation] A Wide Tuning Range-163 FOM CMOS Quadrature Ring Oscillator for Inductorless Reconfigurable PLL (2010)
  • Author(s): Shashank Lingala, Ramesh K.Pokharel, Abhishek Tomar, Haruichi Kanaya, Keiji Yoshida,
  • Organizer: IEEE International conference on Signals, Systems, and Electronics doi no.:978-1-4244-6454-1/10/$26.00@IEEE 2010
  • Place of Presentation: Nanjing, China
  • Year and Date: 2010-09-18
• [Presentation] A Wide Tuning Range-163 FOM CMOS Quadrature Ring Oscillator for Inductorless Reconfigurable PLL (2010)
  • Author(s): S.Lingala, R.K.Pokharel, et al.
  • Organizer: IEEE International conference on Signals, Systems, and Electronics
  • Place of Presentation: 南京(中国)
  • Year and Date: 2010-09-18
• [Presentation] 擬フィボナッチ数列を用いた広帯域リング型DCO の低消費電力化 (2010)
  • Author(s): 濱田智史・Abhishek Tomar・Ramesh K.Pokharel・金谷晴一・吉田啓二
  • Organizer: 電子情報通信学会2010年総合大会 C-12-18
  • Place of Presentation: 東北大学(仙台)
  • Year and Date: 2010-03-16
• [Presentation] 擬フィボナッチ数列を用いたマルチバンド無線通信用低消費電力リング型DCOの開発 (2010)
  • Author(s): 濱田智史・Abhishek Tomar・R.K.Pokharel・金谷晴一・吉田啓二
  • Organizer: 電子情報通信学会技術研究報告 MW2009-204 pp.141-146
  • Place of Presentation: 龍谷大学セミナーハウス(京都)
  • Year and Date: 2010-03-05
• [Presentation] 擬フィボナッチ数列を用いたマルチバンド無線通信用低消費電力リング型DCOの開発 (2010)
  • Author(s): 濱田智史、ポカレル ラメシュ, 他
  • Organizer: 電子通信学会 マイクロ波研究会信学技報
  • Place of Presentation: 京都
  • Year and Date: 2010-03-05
• [Presentation] Low Phase Noise 18kHz Frequency Tuning Step 5 GHz DCO Using Tiny Capacitors Based on Transmission Lines (2010)
  • Author(s): R.K.Pokharel
  • Organizer: IEEE 10^<th> Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems
  • Place of Presentation: ニューオリンズ、北アメリカ
  • Year and Date: 2010-01-12
• [Presentation] 10 Bit 2/5GHz Dual Band Digitally-Controlled LC-Oscillator in 0.18um CMOS Process (2009)
  • Author(s): R.K.Pokharel
  • Organizer: Proc.of 2009 Asia Pacific Microwave Conference (APMC)
  • Place of Presentation: シンガポール
  • Year and Date: 2009-12-09
• [Presentation] 擬フィボナッチ数列を用いた低消費電力リング型DCOの開発 (2009)
  • Author(s): 浜田智史・ポカレルR.K.・金谷晴一・吉田啓
  • Organizer: 平成21年度電気関係学会九州支部連合大会 10-1A-13
  • Place of Presentation: 北九州工業大学(飯塚キャンパス)
  • Year and Date: 2009-09-28
• [Presentation] 0.18umCMOSプロセスによる-162dBmのFOMを有する超広帯域リング型Q-VCOの開発 (2009)
  • Author(s): ポカレル ラメシュ, 他
  • Organizer: 電子通信学会研究会資料シリコンアナログRF研究会
  • Place of Presentation: 東京
  • Year and Date: 2009-03-11
• [Presentation] Design of Digitally Controlled LC Oscillator with Wide Tuning Range in 0.18um TSMC CMOS Technology (2008)
  • Author(s): A. Tomar, et.al.
  • Organizer: The 2008^<th> Asia-Pacific Microwave Conference (APMC)
  • Place of Presentation: 香港
  • Year and Date: 2008-12-19
• [Presentation] Design of Highly linear, 1GHz 8-bit digitally controlled ring oscillator with wide turning range in 0.18um CMOS process (2008)
  • Author(s): R.K.Pokharel, A.Tomar, H.Kanaya, K.Yoshida
  • Organizer: The Proc.of China-Japan Microwave conference pp.623-627
  • Place of Presentation: Shanghai, China
  • Year and Date: 2008-09-12
• [Presentation] Design of Highly linear, 1GHz 8-bit digitally controlled ring oscillator with wide turning range in 0.18um CMOS process (2008)
  • Author(s): R. K. Pokharel, et.al.
  • Organizer: The 2008^<th> China-Japan Microwave conference (CJMW)
  • Place of Presentation: 上海(中国)
  • Year and Date: 2008-09-12
• [Remarks] ホームページ等