Guest Column | November 18, 2013

Patterned Ground Shields For Silicon RFICs – Part 3: Which Way Does The Current Really Go?

By James C. Rautio

Everything is so confusing. In Part I of this series, we found that there is something really strange about the current flowing in an Si substrate underneath a spiral inductor. It is flowing perpendicular to the direction of the spiral turns, when we thought it should be flowing parallel to the turns.

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