Title :
A Ku-Band Frequency Synthesizer in 0.18-μm CMOS Technology
Author :
Peng, Yu-Hsun ; Lu, Liang-Hung
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei
fDate :
4/1/2007 12:00:00 AM
Abstract :
This letter presents a fully integrated frequency synthesizer implemented in a 0.18-mum foundry CMOS process. By employing a modified differential Colpitts voltage controlled oscillator to improve the tuning range and the phase noise, the integer-N frequency synthesizer demonstrates an output frequency from 14.8 to 16.9GHz, allowing wideband operations at Ku-band. Operated at an output frequency of 15GHz, the proposed synthesizer exhibits a reference sideband power of -50dBc and a phase noise of -104.5dBc/Hz at 1-MHz offset. The fabricated circuit consumes a dc power of 70mW from a 2-V supply voltage
Keywords :
CMOS integrated circuits; frequency synthesizers; microwave circuits; phase noise; voltage-controlled oscillators; 0.18 micron; 14.8 to 16.9 GHz; 2 V; 70 mW; CMOS technology; Ku-band frequency synthesizer; differential Colpitts voltage controlled oscillator; frequency dividers; phase noise; phase-locked loops; prescalers; tuning range; CMOS process; CMOS technology; Circuits; Foundries; Frequency synthesizers; Phase noise; Tuning; Voltage; Voltage-controlled oscillators; Wideband; Differential Colpitts voltage controlled oscillator (VCO); frequency dividers; integer-N frequency synthesizers; phase noise; phase-locked loops (PLLs); prescalers;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2007.892953
