Twisted inductors for low coupling mixed-signal and RF applications
NM Neihart, DJ Allstot, M Miller… - 2008 IEEE Custom …, 2008 - ieeexplore.ieee.org
NM Neihart, DJ Allstot, M Miller, P Rakers
2008 IEEE Custom Integrated Circuits Conference, 2008•ieeexplore.ieee.orgParasitic 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.
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.
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.
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