Phase noise in a differential CMOS voltage-controlled oscillator for RF applications

Author

Herzel, Frank ; Pierschel, Michael ; Weger, Peter ; Tiebout, Marc

Author_Institution

Inst. for Semicond. Phys., Frankfurt, Germany

Volume

47

Issue

1

fYear

2000

fDate

1/1/2000 12:00:00 AM

Firstpage

11

Lastpage

15

Abstract

This paper presents theoretical and experimental results on phase noise of differential CMOS oscillators. A simple analytical expression is derived and verified by simulation which relates the phase noise including the device excess noise factor to circuit parameters. In agreement with the theoretical results, an experimental 1.9-GHz oscillator yielded phase noise as low as -100 dBc/Hz at 100-kHz offset at a power consumption of 12 mW. A wide tuning range of 250 MHz was obtained by using PMOSFET´s as varicap with only slight degradation of the phase-noise performance due to the varicap

Keywords

CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; integrated circuit noise; network parameters; nonlinear network analysis; phase noise; voltage-controlled oscillators; 1.9 GHz; 12 mW; 250 MHz; PMOSFETs; RF applications; circuit parameters; differential CMOS voltage-controlled oscillator; excess noise factor; phase noise; power consumption; tuning range; varicap; Analytical models; Circuit noise; Circuit optimization; Circuit simulation; Degradation; Energy consumption; MOSFET circuits; Phase noise; Tuning; Voltage-controlled oscillators;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.818888

Filename

818888