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US 2017/0317658 A1Published application
Transformer of the balanced-unbalanced type
AssigneesSTMicroelectronics (Crolles 2) SAS, STMicroelectronics S.r.l.
InventorsFrédéric Gianesello, Romain Pilard, Cédric Durand
Life of this patent
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Abstract
A transformer of the balanced-unbalanced type includes a primary inductive circuit and a secondary inductive circuit housed inside an additional inductive winding connected in parallel to the terminals of the secondary circuit and inductively coupled with the primary circuit and the secondary circuit.
Claims20
A transformer comprising:
- a primary winding;
- a secondary winding;
- and
- an additional winding surrounding the primary winding and the second winding, the additional winding being inductively coupled to the primary winding and the second winding, wherein the additional winding is coplanar with the primary and secondary winding.
1 more element
A device comprising:
- an antenna;
- a first circuit;
- and
- a transformer coupled between the antenna and the first circuit, the transformer comprising
- a first winding;
- a second winding inductively coupled to the first winding;
- and
- a third winding inductively coupled to the first and second windings, the third winding surrounding a portion of an outermost turn of each of the first and second windings, wherein the first, second, and third windings are formed in a plurality of metal levels.
5 more elements
A method comprising:
- coupling an antenna to a reference terminal via a first winding of a transformer;
- coupling a second winding of the transformer to a third winding of the transformer, the third winding of the transformer being coplanar with the first and second winding of the transformer and surrounding the first and second winding of the transformer;
- and
- differentially coupling the third winding of the transformer to a first circuit.
1 more element
Dependencies are inferred from the claim text.