Title :
Theoretical analysis of low phase noise design of CMOS VCO
Author :
Yao-Huang Kao ; Meng-Ting Hsu
Author_Institution :
Inst. of Commun. Eng., Nat. Chiao-Tung Univ., Hsinchu, Taiwan
Abstract :
A theoretical analysis on low phase noise of voltage-controlled oscillators (VCOs) based on complementary cross-coupled LC VCO by 0.35-μm complementary metal oxide semiconductor technology is demonstrated. From the procedure of optimization steps, the excess noise factor of the amplifier coming from the active device has been determined. The proposed VCO operates at 2 GHz with phase noise of -116 dBc/Hz at offset frequency 600 kHz. The power consumption is 22.62 mW under 3 V bias with 9.1% frequency tuning. The achievement of low phase noise is also matched with prediction by formula in the frequency domain.
Keywords :
CMOS integrated circuits; circuit tuning; integrated circuit design; integrated circuit noise; phase noise; voltage-controlled oscillators; 0.35 micron; 2 GHz; 22.62 mW; 3 V; 600 kHz; CMOS VCO; complementary cross-coupled LC VCO; frequency domain; frequency tuning; low phase noise design; noise factor; voltage-controlled oscillators; Active noise reduction; CMOS technology; Frequency; Inductance measurement; Inductors; Phase noise; Q factor; Semiconductor device noise; Varactors; Voltage-controlled oscillators; Complementary metal oxide semiconductor (CMOS); excess noise factor; phase noise; voltage-controlled oscillator (VCO);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2004.840974
