A 52% tuning range QVCO with a reduced noise coupling scheme and a minimum FOMT of 196dBc/Hz

Mohammad Elbadry, Sachin Kalia, Ramesh Harjani

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

5 Scopus citations

Abstract

A wide-tuning range QVCO with a novel complimentary-coupling scheme is presented. Two NMOS-only VCOs are coupled via complimentary PMOS injection transistors. This shifts the injection current away from the zero-crossings of the output voltage, thereby reducing the sensitivity of the VCO to injection noise, which results in significant phase-noise improvement. Phase-shift is achieved without frequency-dependent phase-shifting networks, allowing robust coupling over a wide tuning range. As a proof-of-concept, a prototype is designed in TSMC 65nm process with 4-bits of discrete tuning spanning the frequency range 4.6-7.8 GHz (52% tuning range). The prototype operates from 0.5V supply, with a power consumption ranging from 7.4mW-11mW, while achieving a minimum figure-of-merit (FOM) of 181.6dBc/Hz, and a minimum figure-of-merit with tuning-range (FOMT) of 196dBc/Hz.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE 2014 Custom Integrated Circuits Conference, CICC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479932863
DOIs
StatePublished - Nov 4 2014
Event36th Annual Custom Integrated Circuits Conference - The Showcase for Integrated Circuit Design in the Heart of Silicon Valley, CICC 2014 - San Jose, United States
Duration: Sep 15 2014Sep 17 2014

Publication series

NameProceedings of the IEEE 2014 Custom Integrated Circuits Conference, CICC 2014

Other

Other36th Annual Custom Integrated Circuits Conference - The Showcase for Integrated Circuit Design in the Heart of Silicon Valley, CICC 2014
Country/TerritoryUnited States
CitySan Jose
Period9/15/149/17/14

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