Development of low phase noise digitally controlled CMOS ring oscillator with quadrature outputs

Prapto Nugroho, Ramesh K. Pokharel, Awinash Anand, Abishek Tomar, Haruichi Kanaya, Keiji Yoshida

Research output: Contribution to journalArticle

Abstract

This article present a development of low phase noise 14-bit digitally controlled oscillator (DCO) based on ring oscillator with quadrature output in 0.18-μm CMOS technology. Proposed design use digital control and feed-forward technique to obtain wider output swing and stable quadrature output on even number of stages respectively. Designed DCO has tuning frequency range from 212 MHz to 1 GHz. Phase noise at 1-MHz frequency offset is -123.93 dBc/Hz, which is the lowest among the recently published result.

Original languageEnglish
Pages (from-to)1479-1483
Number of pages5
JournalMicrowave and Optical Technology Letters
Volume54
Issue number6
DOIs
Publication statusPublished - Jun 1 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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