Title :
A 1-GHz LC voltage-controlled oscillator with high linearity and wide range
Author :
Tan, Wenhua ; Chen, Guican ; Zhang, Hong
Author_Institution :
Dept. of Microelectron., Xi´´an Jiaotong Univ., Xian
Abstract :
A 1-GHz low phase noise LC voltage-controlled oscillator (VCO) with high tuning linearity and wide range is presented. A novel resonant tank with a MOS varactor array and distributed control voltages is proposed to improve the tuning linearity and maintain a wide tuning range. Simulation results show that the tuning nonlinearity of the proposed VCO is only 0.8%, reduced by a factor of 4 compared with a conventional one. The VCO draws 5.2 mA current from a 1.8 V supply and can be tuned from 967 MHz to 1146 MHz (17%). The simulated phase noise is -132.2 dBc@1 MHz for an oscillation frequency of 1056 MHz.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; integrated circuit noise; phase noise; varactors; voltage-controlled oscillators; LC voltage-controlled oscillator; MOS varactor array; current 5.2 mA; distributed control voltage; frequency 967 MHz to 1146 MHz; linear CMOS LC-VCO; low-phase noise oscillator; resonant tank; tuning linearity; voltage 1.8 V; Capacitance-voltage characteristics; Circuit optimization; Linearity; Phase locked loops; Phase noise; Resonance; Tuning; Varactors; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Electron Devices and Solid-State Circuits, 2008. EDSSC 2008. IEEE International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-2539-6
Electronic_ISBN :
978-1-4244-2540-2
DOI :
10.1109/EDSSC.2008.4760692
