An ultra low power consumption and low phase noise VCO operating in sub-threshold region

Qing Liu*, Yu Zhao, Jiangtao Sun, Satoshi Kurachi, Nobuyuki Itoh, Toshihiko Yoshimasu

*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

In this paper, a voltage controlled oscillator (VCO) with ultra low dc power consumption and low phase noise is proposed for 2.4 GHz Bluetooth. To reduce the dc power consumption, a novel bias circuit is proposed instead of a conventional tail-current circuit to decrease the supply voltage. In addition, the proposed VCO is designed to operate in sub-threshold region for decreasing the operation current. Thus, the dc power consumption is largely reduced. To improve the phase noise, a modified LC-tank is proposed to suppress the harmonic noise modulation and to prevent the phase noise degradation by the down-converted Flick noise. The LC-VCO is simulated using 0.11 μm CMOS technology. The simulation results show a phase noise of -115dBc/Hz at 1MHz offset from the 2.4 GHz carrier frequency with only 0.35 mW power consumption.

Original languageEnglish
Title of host publication2010 International Symposium on Signals, Systems and Electronics, ISSSE2010 - Proceedings
Pages257-260
Number of pages4
DOIs
Publication statusPublished - 2010
Event2010 International Symposium on Signals, Systems and Electronics, ISSSE2010 - Nanjing, China
Duration: 2010 Sep 172010 Sep 20

Publication series

NameConference Proceedings of the International Symposium on Signals, Systems and Electronics
Volume1

Conference

Conference2010 International Symposium on Signals, Systems and Electronics, ISSSE2010
Country/TerritoryChina
CityNanjing
Period10/9/1710/9/20

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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