Title :
Wide tuning band quadrature VCO
Author :
Mellouli, Dorra ; Mnif, Hassene ; Loulou, Mourad
Author_Institution :
Res. Unit on Electron. & Inf. Technol., Nat. Eng. Sch. of Sfax, Sfax
Abstract :
A CMOS quadrature VCO has been designed in a 0.35 mum CMOS process. Using a combination of switched binary-weighted capacitors and standard varactors, this VCO achieves a 59% tuning range with a control voltage ranging from -0.25 to 0.75 V. The phase-noise varies within the tuning range from -131.3 dBc/Hz to -121.2 dBc/Hz at 1 MHz frequency offset. The circuit consumes only 9.37 mW at 2.71 GHz and 12.5 mW at 1.8 GHz.
Keywords :
CMOS integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; voltage-controlled oscillators; CMOS process; CMOS quadrature VCO; complementary metal-oxide-semiconductor; frequency 1.8 GHz; frequency 2.71 GHz; power 12.5 mW; power 9.37 mW; size 0.35 mum; switched binary-weighted capacitors; varactors; voltage -0.25 V to 0.75 V; voltage-controlled oscillators; wide tuning band quadrature; Capacitors; Circuit optimization; Energy consumption; Frequency; Phase noise; RLC circuits; Ring oscillators; Tuning; Varactors; Voltage-controlled oscillators; VCO; phase noise; quadrature VCO;
Conference_Titel :
Design and Test Workshop, 2008. IDT 2008. 3rd International
Conference_Location :
Monastir
Print_ISBN :
978-1-4244-3479-4
Electronic_ISBN :
978-1-4244-3478-7
DOI :
10.1109/IDT.2008.4802477
