A single-LC-tank 5-10 GHz quadrature local oscillator for cognitive radio applications

Jianhua Lu*, Ning Yi Wang, Mau-Chung Chang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

This paper presents a local oscillator (LO) that converts oscillation frequencies of 13.3-20GHz from a single-LC-tank VCO to the intended 5-10GHz with continuous frequency coverage. A 4-stage differential injection-locked ring oscillator (ILRO) is used after the latch-based divider to produce quadrature output phases without requiring 50% duty cycle of input signals as those of conventional divide-by-2 approaches. When implemented in 65nm CMOS, the prototype LO consumes 22mA at 1V supply and is able to exhibit a worst-case phase noise of -102dBc/Hz at 1MHz offset across the entire 5-10GHz band for projected cognitive radio applications.

Original languageEnglish
Title of host publication2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011 - Digest of Papers
DOIs
StatePublished - 1 Aug 2011
Event2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011 - Baltimore, MD, United States
Duration: 5 Jun 20117 Jun 2011

Publication series

NameDigest of Papers - IEEE Radio Frequency Integrated Circuits Symposium
ISSN (Print)1529-2517

Conference

Conference2011 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2011
CountryUnited States
CityBaltimore, MD
Period5/06/117/06/11

Keywords

  • CMOS
  • Cognitive Radio
  • Injection-locked ring oscillator
  • LC-VCO
  • Quadrature Phase Local Oscillator

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