Title :
Exact calculation of oscillation amplitude and predicting power consumption for CMOS Colpitts oscillators
Author_Institution :
Integrated Syst. Lab., Swiss Fed. Inst. of Technol., Zurich, Switzerland
Abstract :
In radio communication applications, the important specifications for a local oscillator are oscillation amplitude, phase-noise, and power consumption. Exact expressions for oscillation amplitude have been derived for Colpitts oscillators implemented with MOS transistors. Simple relationships relating amplitude to bias current and LC-tank quality factor, as well as the transistor´s aspect ratio, make the estimation of power consumption a straight forward exercise
Keywords :
CMOS analogue integrated circuits; Q-factor; equivalent circuits; network analysis; radiofrequency oscillators; time-domain analysis; CMOS Colpitts oscillators; LC-tank quality factor; bias current; local oscillator; oscillation amplitude; phase-noise; power consumption estimation; transistor aspect ratio; CMOS technology; Circuits; Energy consumption; Laboratories; Local oscillators; MOSFETs; Phase noise; Radio communication; Radio frequency; Ring oscillators;
Conference_Titel :
Circuits and Systems, 1997. ISCAS '97., Proceedings of 1997 IEEE International Symposium on
Print_ISBN :
0-7803-3583-X
DOI :
10.1109/ISCAS.1997.622156
