Tunable Coupled Inductor Q-Enhancement for Parallel Resonant LC TanksB. Georgescu, H. Pekau, J. Haslett, J. McRory
IEEE Transactions on Circuits and Systems - II: Analog and Digital Signal Processing, Vol. 50, No. 10, pp. 705-713, October 2003
A tunable transformer-based Q-enhancement method for monolithic inductors used in parallel resonant LC tanks is presented. The Q of the inductor that forms the transformer primary is enhanced by canceling the voltage drop across the series loss resistance of the primary with a voltage of opposite polarity that is induced by a current in the secondary. The circuit allows dc voltage control of Q-enhancement. Techniques to address stability issues associated with the positive feedback are described. The circuit was fabricated in 0.18-um CMOS and the performance was verified experimentally.
CONTACTS: Bogdan Georgescu, Holly Pekau, Jim Haslett, John McRory
SUBJECTS: RF Circuits and Systems
TYPE: Journal Publication
Download this document C0243.pdf (9.0MB Adobe PDF Document)
FAIR USE NOTICE: This site contains copyrighted material made available under the usual allowance for making single copies of copyrighted work for scholarly research or education. If you wish to use copyrighted material from this site for purposes that go beyond this, you must obtain permission from the copyright owner. For further information please see Copyright & Fair Use or Access Copyright. All works relied upon or used in derivative works should be cited with the full references as listed below.
©2013 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.