Mutual coupling of on-chip inductors in CMOS technology

Abstract

Mutual coupling of spiral inductors is investigated comprehensively in this work. The topics include coupling between two spiral inductors by keeping identical self-inductance with different layout configurations such as separation distances, device location and relative current directions. The experimental results show that the inductor with special layout design exhibits low coupling inductance and capacitance. Results of this study will provide the layout guideline for a designer to implement more than one inductor in RFIC circuits.