Title :
A 2-GHz Low Power Differentially Tuned CMOS Monolithic LC-VCO
Author :
Zhang, Li ; Chi, Baoyong ; Yao, JinKe ; Wang, ZhiHua ; Chen, Hongyi
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing
Abstract :
A 2 GHz differentially tuned CMOS monolithic LC-VCO was designed and fabricated in 0.18-mum CMOS process. The VCO has a 16.15% tuning range (from 1.8998 GHz to 2.2335 GHz) due to a combination of analog and digital tuning technique (4-bit binary switch-capacitor array). The measured phase noise is -118.17 dBc/Hz at 1 MHz offset from 2.158 GHz carrier. With the presented smart switch, the phase noise varies no more than 3 dB at different digital control bits. The phase noise changes only about 2 dB in the tuning range due to the pn-junctions as the varactors. The VCO draws about 2.1 mA current from the 1.8 V power supply and could work in 1.5 V power supply
Keywords :
CMOS integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; monolithic integrated circuits; phase noise; varactors; voltage-controlled oscillators; 0.18 micron; 1 MHz; 1.5 V; 1.8 V; 2 GHz; 2.1 mA; UHF oscillator; differentially tuned CMOS; monolithic LC-VCO; phase noise; pn-junction; power supply; tuning technique; varactor; voltage controlled oscillator; CMOS process; Energy consumption; Phase noise; Phased arrays; Photonic band gap; Power supplies; Switches; Tuning; Varactors; Voltage-controlled oscillators; VCO; binary switchable-capacitor array; differentially tuned; phase noise;
Conference_Titel :
Consumer Electronics, 2006. ISCE '06. 2006 IEEE Tenth International Symposium on
Conference_Location :
St. Petersburg
Print_ISBN :
1-4244-0216-6
DOI :
10.1109/ISCE.2006.1689429
