4.6 Article

Integrated tunable magnetic RF inductor

期刊

IEEE ELECTRON DEVICE LETTERS
卷 25, 期 12, 页码 787-789

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IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LED.2004.839208

关键词

inductor; on-chip; radio frequency (RF); tunable circuits and devices

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We demonstrate, for the first time to our knowledge, a passive, electrically tunable integrated radio frequency (RF) inductor based on a planar solenoid with a thin-film ferromagnetic(FM) (NiFe) core. Variation of inductance is achieved by leading an additional do current through the same device, thereby changing the effective permeability of the FM core. Tuning ranges (relative variations in inductance) of 85%, 35%, and 20% are achieved at 0.1, 1, and 2 GHz, respectively, for inductances in the range of 1 to 150 nH.

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