5-GHz Low Power Current-Reused Balanced CMOS Differential Armstrong VCOs

Author

Chuang, Y.-H. ; Jang, S.-L. ; Lee, S.-H. ; Yen, R.-H. ; Jhao, J.-J.

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei

Volume

17

Issue

2

fYear

2007

Firstpage

139

Lastpage

141

Abstract

This letter proposes 5-GHz low power differential Armstrong voltage controlled oscillators (VCOs) based on balanced topology. One designed VCO uses two single-ended Armstrong VCOs coupled to each other in parallel by balanced structure. The other current-reused VCO uses two single-ended Armstrong VCOs stacked in series. The former VCO oscillates from 4.96 to 5.34GHz and the power consumption is 3.9mW at 0.6-V supply voltage. The latter operates from 4.98 to 5.45GHz and dissipates 2.59mW at 1.8-V supply voltage. The measured phase noises are about -116.71dBc/Hz and -110.02dBc/Hz at 1-MHz offset frequency from 5.1-GHz band, respectively. The former and the latter VCO have an advantage of low power consumption and provide a good figure of merit of about -185dBc/Hz and -180dBc/Hz, respectively

Keywords

CMOS integrated circuits; MMIC oscillators; low-power electronics; voltage-controlled oscillators; 0.6 V; 1.8 V; 2.59 mW; 3.9 mW; 4.96 to 5.34 GHz; Armstrong voltage controlled oscillators; CMOS differential oscillators; balanced topology; microwave oscillators; phase noise; Circuit optimization; Circuit topology; Coils; Coupling circuits; Energy consumption; Phase noise; Radio frequency; Tuning; Voltage; Voltage-controlled oscillators; Armstrong; CMOS; balanced; low power; voltage controlled oscillators (VCOs);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2006.890342

Filename

4079625