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

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 Dec 24
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
CountryChina
CityNanjing
Period10/9/1710/9/20

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Liu, Q., Zhao, Y., Sun, J., Kurachi, S., Itoh, N., & Yoshimasu, T. (2010). An ultra low power consumption and low phase noise VCO operating in sub-threshold region. In 2010 International Symposium on Signals, Systems and Electronics, ISSSE2010 - Proceedings (pp. 257-260). [5607111] (Conference Proceedings of the International Symposium on Signals, Systems and Electronics; Vol. 1). https://doi.org/10.1109/ISSSE.2010.5607111