Title :
On the exact design of RF oscillators
Author_Institution :
Integrated Syst. Lab., Fed. Inst. of Technol., Zurich, Switzerland
Abstract :
Important requirements for oscillators used in RF applications typically include well controlled amplitude, low phase noise relative to the carrier and low power consumption. This paper presents a rigorous analysis of phase noise for the Colpitts oscillator and derives an exact formula for the phase noise to carrier ratio. The latter is inversely proportional to the bias current and the quality factor of the LC resonator. Improvement in the active device has only a minor impact on the oscillator performance at 1-2 GHz
Keywords :
Q-factor; UHF integrated circuits; UHF oscillators; integrated circuit design; integrated circuit noise; phase noise; 1 to 2 GHz; Colpitts oscillator; RF oscillators; bias current; phase noise; phase noise to carrier ratio; power consumption; quality factor; Equations; Inductors; Interference; Laboratories; Local oscillators; Noise measurement; Phase measurement; Phase noise; Radio frequency; White noise;
Conference_Titel :
Custom Integrated Circuits Conference, 1998. Proceedings of the IEEE 1998
Conference_Location :
Santa Clara, CA
Print_ISBN :
0-7803-4292-5
DOI :
10.1109/CICC.1998.694903
