Title :
A low phase noise wide tuning range CMOS quadrature VCO using cascade topology
Author :
Wang, Chao-Shiun ; Kao, Shiau-Wen ; Huang, Po-Chiun
Author_Institution :
NTU-MTK Res. Wireless Lab., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A new fully integrated 2.4GHz CMOS quadrature voltage control oscillator (VCO) is presented. It achieves low phase noise at quadrature outputs using the proposed cascade coupling topology. Digitally-controlled capacitor bank is designed for wide tuning range from 2.4 to 2.9GHz. By a standard 0.25 μm single-poly CMOS process with thick top metal, total power consumption of two VCO cores and buffers for generating quadrature signal are 6mA and 12mA respectively. Measured phase noise at 1MHz offset from the center frequency is -114dbc/Hz.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; cascade networks; circuit tuning; integrated circuit noise; low-power electronics; phase noise; voltage-controlled oscillators; 12 mA; 2.4 GHz; 6 mA; CMOS quadrature VCO; cascade topology; combined phaser diagram; differential varactors; digitally-controlled capacitor bank; fully integrated VCO; low phase noise; low power operation; single-poly CMOS process; symmetrical spiral inductors; wide tuning range; CMOS process; Capacitors; Energy consumption; Phase noise; Power generation; Signal generators; Topology; Tuning; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Advanced System Integrated Circuits 2004. Proceedings of 2004 IEEE Asia-Pacific Conference on
Print_ISBN :
0-7803-8637-X
DOI :
10.1109/APASIC.2004.1349430
