Title: Low-noise voltage-controlled oscillators using enhanced LC-tanks
Authors: Craninckx, J ×
Steyaert, Michel #
Issue Date: Dec-1995
Publisher: Institute of Electrical and Electronics Engineers
Series Title: IEEE Transactions on Circuits and Systems II, Analog and Digital Signal Processing vol:42 issue:12 pages:794-804
Abstract: Frequency synthesizers used in modern telecommunication systems, such as cellular telephones, need to have very low phase noise, Therefore, in the design of high performance frequency synthesizers using Phase Locked Loops (PLL), the Voltage-Controlled Oscillator (VCO) has become a key issue, The trend towards monolithic integration poses some major challenges, This paper discusses the phase noise aspects of LC-tuned oscillators, A general formula is developed, based on the concepts of effective resistance and capacitance, The formula also applies for oscillators using active inductors, From these results the importance of an inductor,vith very low series resistance is apparent. To circumvent the technological limits given by an inductor's series resistance, a presented enhanced LC-tank can be used to make a trade-off between noise and power.
ISSN: 1057-7130
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - MICAS, Microelectronics and Sensors
× corresponding author
# (joint) last author

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