CHARACTERIZATION OF CAPACITIVE COUPLING FOR ON-CHIP CIRCULAR STACKED INDUCTORS

Authors: Liu, Xiao-Cha; Liu, Ping

Source: International Journal of Infrared and Millimeter Waves, Volume 27, Number 1, January 2006 , pp. 79-90(12)

Publisher: Springer

Abstract:

Capacitive coupling effects in some circular stacked inductors are studied in this paper, by taking into account the possible incomplete overlapping and cross-overlapping between up and bottom tracks of different layers. Formulas are derived for extracting the equivalent capacitance of double-and multi-spiral circular inductors with integral and fractional number of turns. Compared with the full-wave and the analytical methods with the completely overlapping assumption, the proposed method can predict equivalent capacitance and self-resonance frequency (f _SR ) accurately for on-chip circular stacked inductors used in the design of RFICs.

Keywords: capacitive coupling; on-chip stacked inductors; equivalent capacitance; self-resonance frequency; incomplete overlapping

Document Type: Research article

DOI: http://dx.doi.org/10.1007/s10762-007-9261-5

Publication date: 2006-01-01

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