A 2.6mW, -192dB/Hz FOM Class-C QVCO using capacitive source degeneration coupling

Zhi Hao Hong, Chuan Yi Wu, Yu-Te Liao

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

2 Scopus citations

Abstract

The paper presents a novel Class-C type QVCO using a capacitive source coupling mechanism to enhance the startup robustness over process-temperature- voltage variations. Class-C type oscillator has superior phase noise performance with low power consumption at the cost of weak startup. In this design, complementary architecture and capacitive source degeneration coupling are employed to increase the loop gain of Class-C quadrature oscillator. The capacitive coupling mechanism also provides extra phase shifts that eliminate the quality factor degradation of the LC tank in QVCO design. An optimal coupling factor is derived to compromise power-phase noise trade-offs. The proposed 2.4GHz QVCO, fabricated in 0.18μm CMOS technology, achieves -128dBc/Hz at 1MHz offsets while only consuming 2.6mW. The design attains a remarkable figure-of-merit (FOM) of -192dB/Hz.

Original languageEnglish
Title of host publication2014 IEEE MTT-S International Microwave Symposium, IMS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479938698
DOIs
StatePublished - 1 Jan 2014
Event2014 IEEE MTT-S International Microwave Symposium, IMS 2014 - Tampa, FL, United States
Duration: 1 Jun 20146 Jun 2014

Publication series

NameIEEE MTT-S International Microwave Symposium Digest
ISSN (Print)0149-645X

Conference

Conference2014 IEEE MTT-S International Microwave Symposium, IMS 2014
CountryUnited States
CityTampa, FL
Period1/06/146/06/14

Keywords

  • Capacitive source degeneration coupling
  • Low phase noise
  • Low power
  • Startup robustness

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