Title :
A 2.4 GHz low-power low-phase-noise CMOS VCO using spiral inductors and junction varactors
Author :
Long, Jie ; Weber, Robert J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA
Abstract :
A completely integrated 2.4 GHz low-power low-phase-noise voltage-controlled oscillator (VCO) was implemented in a standard 0.18 μm single-poly, 6-metal mixed-signal CMOS process. It employs junction varactors as voltage-controlled capacitances along with on-chip spiral inductors to form the LC-tank. The VCO-core draws 1.8 mA of current from a 1.2 V supply. Simulated phase noise is shown as -101.9 dBc/Hz at a 100 kHz offset from the carrier frequency of 2.4 GHz, and -122.1 dBc/Hz at a 1MHz offset. Comparison shows that this design has better performance than previously published similar results. This circuit is in process of being fabricated through the MOSIS Educational Program.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF oscillators; circuit tuning; inductors; integrated circuit layout; integrated circuit noise; mixed analogue-digital integrated circuits; phase noise; varactors; voltage-controlled oscillators; 0.18 micron; 1.2 V; 1.8 mA; 2.4 GHz; LC-tank; MOSIS educational program; VCO core; integrated low-power low-phase-noise voltage-controlled oscillator; junction varactors; low-power low-phase-noise CMOS VCO; mixed-signal CMOS process; on-chip spiral inductors; simulated phase noise; voltage-controlled capacitances; CMOS process; Capacitance; Circuit simulation; Frequency; Inductors; Phase noise; Spirals; Varactors; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329061
