A Wide-band Low Noise Quadrature CMOS VCO

Author

Cho, Yi-Hsien ; Tsai, Ming-Da ; Chang, Ying-Tang ; Wang, Huei

Author_Institution

Dept. of Electr. Eng. & Graduate Inst. of Commun. Eng., National Taiwan Univ., Taipei

fYear

2005

fDate

Nov. 2005

Firstpage

325

Lastpage

328

Abstract

A wide tuning range and low noise CMOS quadrature voltage-controlled oscillator (QVCO) using 0.18-mum 1P6M standard CMOS process is proposed in this paper. The VCO is realized employing switchable capacitors, so as to work in dual band and increase operation frequency. Moreover, the dual band operation could decrease the tuning sensitivity in each band and hence lower the phase noise. The VCO operates from 5.14 to 6.3 GHz with more than 20% tuning range. The measured phase noise at 1-MHz offset is -120.2 dBc/Hz at 5.5 GHz with VCO cores drawing total current of 8 mA at 1.8 V supply and the output power is about 1.5 dBm

Keywords

CMOS integrated circuits; microwave oscillators; phase noise; switched capacitor networks; voltage-controlled oscillators; 0.18 micron; 1.8 V; 5.14 to 6.3 GHz; 8 mA; CMOS process; low noise quadrature CMOS VCO; phase noise; quadrature voltage-controlled oscillator; switchable capacitors; wide-band CMOS VCO; CMOS process; Capacitors; Current measurement; Dual band; Frequency; Phase noise; Power measurement; Tuning; Voltage-controlled oscillators; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Asian Solid-State Circuits Conference, 2005

Conference_Location

Hsinchu

Print_ISBN

0-7803-9163-2

Electronic_ISBN

0-7803-9163-2

Type

conf

DOI

10.1109/ASSCC.2005.251731

Filename

4017597