Title :
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
fDate :
1/1/2000 12:00:00 AM
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;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
