Variable inductor

Details Variable inductor Variable inductor

2006-08-31

2011-11-08

Enad, Elvin G (Department: 2832)

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

C336S232000, C257S531000

Reexamination Certificate

active

08054153

ABSTRACT:
A variable inductor is provided, which includes a first lead having both ends to receive a pair of difference signals, a second lead having both ends to receive a pair of the difference signals, and a switch selectively supplying a pair of the difference signals to the second lead by turning on/off according to a control signal. Accordingly, a variable inductor can be implemented that is compact and maximizes the variation rate of inductance.

REFERENCES:
patent: 5629553 (1997-05-01), Ikeda et al.
patent: 2004/0018823 (2004-01-01), Yang et al.
patent: 2004/0140528 (2004-07-01), Kim et al.
patent: 2004/0190217 (2004-09-01), Stokes
patent: 2005/0052272 (2005-03-01), Tiebout
patent: 2005/0068146 (2005-03-01), Jessie
patent: 2005/0077992 (2005-04-01), Raghavan et al.
patent: 2005/0085205 (2005-04-01), Behzad
patent: 2007/0158782 (2007-07-01), Heikkinen
patent: WO 0076057 (2000-12-01), None
Park et al.; Variable Inductance Multilayer Inductor With MOSFET Switch Control; Electron Device Letters, IEEE; Mar. 2004; pp. 144-146; vol. 25, Issue 3.
Yang, Design Considersations of Differential Inductors in CMOS Technology for RFIC, Jun. 6-8, 2004, Radio Frequency Integrated Circuits (RFIC) Symposium 2004, Digest of Papers, 2004 IEEE, pp. 449-452.

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