Low phase noise VCO design with symmetrical inductor in CMOS 0.35-μm technology

Author

Tu, Hsin-lung ; Yang, Tsung-Yu ; Chiou, Hwann-Kaeo

Author_Institution

Dept. of Electr. Eng., Nat. Central Univ., Jhongli, Taiwan

Volume

2

fYear

2005

fDate

4-7 Dec. 2005

Abstract

The VCO using differential-driven inductor obtains better performances in many folds such as phase noise, area-saving and higher harmonic rejection. Two VCOs are implemented using 0.35-μm CMOS technology with 25-GHz-f_t, 30-GHz-f_max. The figure of merit (FOM) of VCO using differential-driven inductor is eight higher than using single-excited inductor and saving chip area around 50% (without including pads). The VCO with single-ended inductor achieves 320MHz tuning range with -4.5 dBm output power and phase noise about -102dBc/Hz at 1MHz offset frequency. The VCO with differential-driven inductor achieves 210MHz tuning range with -6.8 dBm output power and phase noise about -112dBc/Hz at 1MHz offset frequency. The core current of these VCOs is 8mA at 2.4-V supply voltage.

Keywords

CMOS integrated circuits; inductors; integrated circuit design; microwave oscillators; phase noise; voltage-controlled oscillators; 0.35 micron; 1 MHz; 2.4 V; 210 MHz; 25 GHz; 30 GHz; 320 MHz; 8 mA; CMOS technology; VCO design; differential-driven inductor; harmonic rejection; phase noise; single-excited inductor; symmetrical inductor; voltage controlled oscillator; CMOS process; CMOS technology; Circuits; Frequency; Inductors; Phase noise; Power generation; Turning; Voltage; Voltage-controlled oscillators; CMOS; VCO; differential-driven inductor; phase noise; symmetrical inductor;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings

Print_ISBN

0-7803-9433-X

Type

conf

DOI

10.1109/APMC.2005.1606472

Filename

1606472