2009•IEEE Microwave and Wireless Components LettersRequires access

Switched Inductor With Wide Tuning Range and Small Inductance Step Sizes

Marcel Kossel, Thomas Morf, P. Buchmann, Martin Schmatz, Christian Menolfi, Thomas Toifl

Abstract

A switched inductor based on mutual-inductance switching is proposed that aims at increasing the inductance tuning range as well as the number of inductance step sizes. This is achieved with additional coupling structures and switch constellations. Applied to a 32 nmLCoscillator, the proposed inductor coil enables a frequency tuning range of 100% (1.5 octaves) from 2.8-8.4 GHz with switchable inductance values between 220 and 600 pH.

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Key concepts: Inductance, Inductor, Equivalent series inductance, Electromagnetic coil, Range (aeronautics), Inductive coupling, Topology (electrical circuits), Coupling (piping)