A 90-GHz High DC-To-RF Efficiency VCO with Multi-Way Transformers in 65-nm CMOS

Junghwan Yoo, Heekang Son, Jungsoo Kim, Doyoon Kim, Jae Sung Rieh

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

Abstract

This paper presents a high efficiency gate inductive feedback Colpitts Voltage Controlled Oscillator (VCO) operating near 90 GHz. It includes multi-way transformers at the load, which helps to enhance the DC-To-RF efficiency with boosted impedance and extended voltage swing through drain-buffer and drain-source magnetic couplings. The proposed VCO is fabricated in a 65-nm CMOS process, and showed an oscillation frequency tuning range of 87.5-92.0 GHz (4.5 GHz). Over the frequency range, the output power and the dc power consumption exhibited values of-2.8-1.7 dBm and 6-22.5 mW, respectively. The peak DC-To-RF efficiency was 9.4 %, and the corresponding phase noise was-107.4 dBc/Hz at 10-MHz offset. The lowest phase noise at the optimum bias condition was-116.7 dB/Hz at 10-MHz offset. The chip size is 400 300 μm2 excluding DC and RF pads.

Original languageEnglish
Title of host publication2020 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages25-27
Number of pages3
ISBN (Electronic)9781728165066
DOIs
Publication statusPublished - 2020 Sep
Event2020 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2020 - Hiroshima, Japan
Duration: 2020 Sep 22020 Sep 4

Publication series

Name2020 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2020

Conference

Conference2020 IEEE International Symposium on Radio-Frequency Integration Technology, RFIT 2020
Country/TerritoryJapan
CityHiroshima
Period20/9/220/9/4

Keywords

  • CMOS technology
  • DC-To-RF efficiency
  • phase noise
  • voltage-controlled oscillators

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Radiation

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