A 8-14 GHz varactorless current controlled LC oscillator in 16nm CMOS technology

Somnath Kundu, Vassili Kireev, Chris H. Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a new concept of fine frequency tuning in a differential LC oscillator by injecting quadrature phase shifted current into the tank that can replace the use of a conventional varactor, eliminating all limitations associated with it, such as specific bias voltage requirement, limited Q-factor, technology/process uncertainties, model accuracy etc. Wide tuning range of 8-14 GHz is achieved by 5-bit switched capacitor array distributed across the exit legs of the inductor. The circuit is implemented in 16nm CMOS technology. Oscillator core consumes 2.85mW power from 0.9V supply at 10GHz frequency for 400mV single-ended swing. Phase noise is - 108dBc/Hz at 1MHz offset for no tuning current injection.

Original languageEnglish (US)
Title of host publicationIEEE 58th International Midwest Symposium on Circuits and Systems
Subtitle of host publicationClimbing to New Heights, MWSCAS 2015 - Conference Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467365574
DOIs
StatePublished - Sep 28 2015
Event58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015 - Fort Collins, United States
Duration: Aug 2 2015Aug 5 2015

Publication series

NameMidwest Symposium on Circuits and Systems
Volume2015-September
ISSN (Print)1548-3746

Other

Other58th IEEE International Midwest Symposium on Circuits and Systems, MWSCAS 2015
CountryUnited States
CityFort Collins
Period8/2/158/5/15

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Keywords

  • LC oscillators
  • common-mode feedback
  • current controlled oscillators
  • phase noise

Cite this

Kundu, S., Kireev, V., & Kim, C. H. (2015). A 8-14 GHz varactorless current controlled LC oscillator in 16nm CMOS technology. In IEEE 58th International Midwest Symposium on Circuits and Systems: Climbing to New Heights, MWSCAS 2015 - Conference Proceedings [7282096] (Midwest Symposium on Circuits and Systems; Vol. 2015-September). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWSCAS.2015.7282096