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 language | English (US) |
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Title of host publication | Proceedings of the IEEE 2014 Custom Integrated Circuits Conference, CICC 2014 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9781479932863 |
DOIs | |
State | Published - Nov 4 2014 |
Event | 36th 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 2014 → Sep 17 2014 |
Publication series
Name | Proceedings of the IEEE 2014 Custom Integrated Circuits Conference, CICC 2014 |
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Other
Other | 36th Annual Custom Integrated Circuits Conference - The Showcase for Integrated Circuit Design in the Heart of Silicon Valley, CICC 2014 |
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Country/Territory | United States |
City | San Jose |
Period | 9/15/14 → 9/17/14 |
Bibliographical note
Publisher Copyright:© 2014 IEEE.