Title :
A constant power consumption CMOS LC oscillator using improved high-Q active inductor with wide tuning-range
Author :
Wu, Ming-Juei ; Yang, Jyh-Neng ; Lee, Chen-Yi
Author_Institution :
Dept. of Electron. Eng., Minghsin Univ. of Sci. Technol., Hsin-Chu, Taiwan
Abstract :
An improved CMOS high-Q active inductor and a constant power consumption oscillator with wide tuning-range are presented. The inductor using one feedback resistor results in a gain to improve the Q-value of the inductor and tune the inductance (L). Based on this inductor, a negative resistance LC-tuned oscillator with constant power consumption and wide tuning-range has been designed. The simulation results show that the improved active inductor can achieve the maximum Q-value of 3500. The power consumption of a constant value around 10 mW exists in the oscillator. This oscillator also depicts a reasonable phase noise performance of -91 dBc/Hz at 600 kHz from 0.8 GHz to 3 GHz range. Furthermore, the deviation of the phase noise is as small as 6 dBc/Hz during this tuning-range.
Keywords :
CMOS integrated circuits; Q-factor; UHF integrated circuits; UHF oscillators; circuit feedback; circuit simulation; circuit tuning; inductors; integrated circuit design; integrated circuit noise; negative resistance circuits; phase noise; power consumption; 0.8 to 3 GHz; 10 mW; 600 kHz; CMOS LC oscillator design; CMOS high-Q active inductor; circuit simulation; circuit tuning; constant power consumption oscillator; feedback resistor; negative resistance LC tuned oscillator; phase noise; Active inductors; CMOS process; CMOS technology; Circuits; Energy consumption; Microwave oscillators; Phase noise; Power engineering and energy; Radio frequency; Ring oscillators;
Conference_Titel :
Circuits and Systems, 2004. MWSCAS '04. The 2004 47th Midwest Symposium on
Print_ISBN :
0-7803-8346-X
DOI :
10.1109/MWSCAS.2004.1354366
