Low Phase Noise Differential CMOS VCO Based on Tapped-Inductor Resonator

Author

Chuang, Yun-Hsueh ; Jang, Sheng-Lyang ; Lee, Chien-Feng ; Lee, Shao-Hua ; Liu, Cheng-Bing

Author_Institution

Nat. Taiwan Univ. of Sci. & Technol., Taipei

fYear

2007

fDate

25-27 April 2007

Firstpage

1

Lastpage

4

Abstract

The design of a low phase noise 4 GHz voltage controlled oscillator (VCO) based on tapped inductor with 10% frequency tuning range fabricated in 0.18-um 1P6M CMOS technology is reported. The LC resonator consists of two tapped inductors and varactors. The varactors have one control terminal to vary the effective resonator capacitance, which is used to fine tune VCO output frequency. The VCO core consumes power of 7.5 mW at 1.5 V supply voltage. The measured phase noise is -121 dBc/Hz at 1MHz offset from the oscillation frequency of 4.4 GHz. The oscillation frequency can be tuned from to 4.05 GHz to 4.47 GHz. This topology can reduce the drain-to-body junction capacitance and can increase the tuning range.

Keywords

CMOS analogue integrated circuits; MMIC oscillators; circuit tuning; field effect MMIC; inductors; integrated circuit noise; phase noise; resonators; varactors; voltage-controlled oscillators; 1P6M CMOS technology; LC resonator; drain-to-body junction capacitance; frequency 4 GHz; frequency 4.05 GHz to 4.47 GHz; frequency tuning; low phase noise differential CMOS VCO; oscillation frequency; power 7.5 mW; size 0.18 mum; tapped-inductor resonator; varactors; voltage 1.5 V; voltage controlled oscillator; CMOS technology; Capacitance; Frequency measurement; Inductors; Noise measurement; Phase noise; Tuning; Varactors; Voltage measurement; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Design, Automation and Test, 2007. VLSI-DAT 2007. International Symposium on

Conference_Location

Hsinchu

Print_ISBN

1-4244-0583-1

Electronic_ISBN

1-4244-0583-1

Type

conf

DOI

10.1109/VDAT.2007.373249

Filename

4239441