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US 6,794,977 B2Granted
Planar transformers
AssigneeNokia Corportation
InventorKaare Tais Christensen
Life of this patent
Estimating the term…
Abstract
In a planar transformer, at least a portion of each of the windings are intermingled in an intermingled portion. Within the intermingled portion, each full turn of each winding is effected by one self-crossing and two crossings of each other winding having turns in said intermingled portion. The windings may be formed in the conductor layers of an integrated circuit.
Claims15
A substantially planar transformer comprising:
- a plurality of windings and having an intermingled portion in which at least a portion of a first winding is intermingled with at least a portion of at least a second winding,
- wherein each full turn of each winding in said intermingled portion is effected by one crossing of said each winding over said each winding and two crossings of said each winding over each of the other windings having turns in said intermingled portion, and
- wherein said transformer is included in an integrated circuit which includes a ground shield having a plurality of substantially radially extending fingers connected by a broken ring.
Dependencies are inferred from the claim text.