Preservation of Phase Resolution with Wideband Integer-N Based Phase Modulators

Kevin Grout, Jennifer Kitchen

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


This paper presents a method for creating a wideband PLL-based phase shifter, which yields maximum phase resolution over its entire range of output frequencies. Furthermore, by generating the phase shifts at low frequency and upconverting the phase information with the PLL, this system can generate phase shifts of resolution comparable with state of the art phase modulators without the need for complex matching or calibration techniques. A rigorous proof of the necessary and sufficient conditions for maximum phase resolution in integer-N synthesizers is presented. A 0.64-2.7 GHz, 7-bit phase modulator system is designed and simulated in a 1V 65nm CMOS process, and the results prove the efficacy of the presented modulation method. The presented design shows finer phase resolution than is achievable using current-starved inverter based delays in the 65nm process.

Original languageEnglish (US)
Title of host publicationRWW 2020 - 2020 IEEE Radio and Wireless Symposium
PublisherIEEE Computer Society
Number of pages3
ISBN (Electronic)9781728111209
StatePublished - Jan 2020
Event2020 IEEE Radio and Wireless Symposium, RWW 2020 - San Antonio, United States
Duration: Jan 26 2020Jan 29 2020

Publication series

NameIEEE Radio and Wireless Symposium, RWS
ISSN (Print)2164-2958
ISSN (Electronic)2164-2974


Conference2020 IEEE Radio and Wireless Symposium, RWW 2020
Country/TerritoryUnited States
CitySan Antonio

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Communication


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