Title :
A 12.5 GHz back-gate tuned CMOS voltage controlled oscillator
Author :
Mostafa, Ahmed H. ; El-Gama, Mourad N.
Author_Institution :
Microelectron. & Comput. Syst. Lab., McGill Univ., Montreal, Que., Canada
Abstract :
This paper presents the design and measurements of a 12.5 GHz CMOS VCO. The circuit is an LC oscillator using an integrated octagonal differential inductor. The VCO is fully integrated and fabricated in a standard 0.35 μm CMOS process. The frequency is tuned using the back-gate voltages of a PMOS cross-coupled differential pair. The tuning range of the VCO is 300 MHz. The maximum achieved frequency of operation is 12.5 GHz using a 3.5 V power supply. The measured phase noise at 100 MHz offset is -85 dBc/Hz. The design is optimized for high frequency operation, achieving the highest oscillation frequency for a CMOS VCO of this type to be published to date
Keywords :
CMOS analogue integrated circuits; MMIC oscillators; circuit optimisation; circuit tuning; integrated circuit design; integrated circuit noise; phase noise; voltage-controlled oscillators; 0.35 micron; 12.5 GHz; 3.5 V; CMOS voltage controlled oscillator; LC oscillator; PMOS cross-coupled differential pair; SHF; back-gate tuned CMOS VCO; back-gate voltages; high frequency operation; integrated octagonal differential inductor; phase noise; tuning range; CMOS process; Circuit optimization; Frequency measurement; Inductors; Integrated circuit measurements; Noise measurement; Power supplies; Tuning; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Electronics, Circuits and Systems, 2000. ICECS 2000. The 7th IEEE International Conference on
Conference_Location :
Jounieh
Print_ISBN :
0-7803-6542-9
DOI :
10.1109/ICECS.2000.911529
