Low Phase Noise 14-Bit Digitally Controlled CMOS Quadrature Ring Oscillator

• POKHAREL Ramesh K.

  Kyushu University

• NUGROHO Prapto

  Kyushu University

• ANAND Awinash

  Kyushu University

• TOMAR Abhishek

  G.B. Pant University of Agriculture & Technology

• KANAYA Haruichi

  Kyushu University

• YOSHIDA Keiji

  Kyushu University

抄録

High phase noise is a common problem in ring oscillators. Continuous conduction of the transistor in an analog tuning method degrades the phase noise of ring oscillators. In this paper, a digital control tuning which completely switches the transistors on and off, and a 1/f noise reduction technique are employed to reduce the phase noise. A 14-bit control signal is employed to obtain a small frequency step and a wide tuning range. Furthermore, multiphase ring oscillator with a sub-feedback loop topology is used to obtain a stable quadrature outputs with even number of stages and to increase the output frequency. The measured DCO has a frequency tuning range from 554MHz to 2.405GHz. The power dissipation is 112mW from 1.8V power supply. The phase noise at 4MHz offset and 2.4GHz center frequency is -134.82dBc/Hz. The FoM is -169.9dBc/Hz which is a 6.3dB improvement over the previous oscillator design.

収録刊行物

• IEICE Transactions on Electronics

  IEICE Transactions on Electronics E96.C (2), 262-269, 2013

  一般社団法人 電子情報通信学会

キーワード

• sub-feedback
• phase noise
• ring oscillator
• digitally controlled oscillator
• quadrature outputs

詳細情報

• CRID: 1390282679354380416
• NII論文ID: 10031167344
• NII書誌ID: AA10826283
• DOI: 10.1587/transele.e96.c.262
• ISSN: 17451353
• ISSN: 09168524
• Web Site: https://www.jstage.jst.go.jp/article/transele/E96.C/2/E96.C_262/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可