Title :
Differential VCO and passive frequency doubler in 0.18 /spl mu/m CMOS for 24 GHz applications
Author :
Ozis, Dicle ; Neihart, Nathan M. ; Allstot, David J.
Author_Institution :
Washington Univ., Seattle, WA
Abstract :
Circuits for generating a 24 GHz LO signal indirectly using a 12 GHz VCO cascaded with a 2times passive mixer and directly from a standalone 24 GHz VCO are compared. Both circuits are implemented in 0.18 mum CMOS. The 24 GHz designs exhibit equivalent phase noise, but the use of a passive mixer enables a 4times reduction in power consumption and a 2times increase in tuning range compared to the standalone 24 GHz VCO. The VCO/mixer combination shows phase noise of -99.94dBc/Hz @ 1 MHz offset from the 25.1 GHz carrier, 12% tuning range, and 11 mW of power consumption
Keywords :
CMOS integrated circuits; frequency multipliers; integrated circuit noise; microwave frequency convertors; microwave mixers; microwave oscillators; phase noise; voltage-controlled oscillators; 0.18 micron; 11 mW; 24 GHz; 25.1 GHz; CMOS integrated circuits; LO signal; differential VCO; passive frequency doubler; passive mixer; phase noise; voltage controlled oscillator; Contracts; Energy consumption; Frequency conversion; High power microwave generation; Mixers; Phase noise; Power generation; Q factor; Space technology; Voltage-controlled oscillators;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2006 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9572-7
DOI :
10.1109/RFIC.2006.1651084
