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US 6,549,096 B2Granted
Switched inductor/varactor tuning circuit having a variable integrated inductor
AssigneeInternational Business Machines Corporation
InventorsRobert A. Groves, Dale K. Jadus
Life of this patent
Estimating the term…
Abstract
The magnetic field of an inductor is decreased by the presence of one or more single loop windings positioned in proximity to the inductor. The single loop windings have open circuits that are selectively closed to magnetically couple the single loop windings to the inductor. A switched inductor/varactor tuning circuit is formed by connecting a varactor to the inductor.
Claims12
A variable integrated inductor comprising:
- an inductor;
- a single loop winding positioned in proximity to said inductor and having an open circuit;
- and
- means for selectively closing the open circuit of said single loop winding to magnetically couple said single loop winding to said inductor and decrease the magnetic field of said inductor.
1 more element
A variable integrated inductor comprising:
- an inductor;
- a plurality of single loop windings positioned in proximity to said inductor and each having an open circuit;
- and
- means for selectively closing the open circuits of said single loop windings to selectively magnetically couple said single loop windings to said inductor and decrease the magnetic field of said inductor.
1 more element
A switched inductor/varactor tuning circuit comprising:
- a varactor;
- an inductor;
- a single loop winding positioned in proximity to said inductor and having an open circuit;
- and
- means for selectively closing the open circuit of said single loop winding to magnetically couple said single loop winding to said inductor and decrease the magnetic field of said inductor.
2 more elements
A switched inductor/varactor tuning circuit comprising:
- a varactor;
- an inductor;
- a plurality of single loop windings positioned in proximity to said inductor and each having an open circuit;
- and
- means for selectively closing the open circuits of said single loop windings to selectively magnetically couple said single loop windings to said inductor and decrease the magnetic field of said inductor.
2 more elements
Dependencies are inferred from the claim text.