Title :
Twisted inductors for low coupling mixed-signal and RF applications
Author :
Neihart, Nathan M. ; Allstot, David J. ; Miller, Matt ; Rakers, Pat
Author_Institution :
Univ. of Washington, Seattle, WA
Abstract :
Parasitic magnetic coupling is a major design challenge for integrated circuit designers. Fundamentally, it originates in conventional spiral inductors because the magnetic field is not localized, extending far beyond the perimeter. This paper introduces a twisted winding scheme for inductors that increases the localization of the magnetic field, reducing parasitic magnetic coupling by as much as 3100X and the edge-to-edge spacing of inductors by 10X. These results are validated in a 0.18 mum CMOS process.
Keywords :
inductors; magnetic circuits; magnetic fields; mixed analogue-digital integrated circuits; windings; CMOS process; edge-to-edge spacing; magnetic field; parasitic magnetic coupling; twisted inductors; Coupling circuits; Inductors; MIMO; Magnetic fields; Magnetic separation; Radio frequency; Silicon; Spirals; Transceivers; Transmitters;
Conference_Titel :
Custom Integrated Circuits Conference, 2008. CICC 2008. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-2018-6
Electronic_ISBN :
978-1-4244-2019-3
DOI :
10.1109/CICC.2008.4672150
