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US 9,755,610 B2Granted
Transformer of the balanced-unbalanced type
AssigneesSTMicroelectronics (Crolles 2) SAS, STMicroelectronics S.r.l.
InventorsFrederic Gianesello, Romain Pilard, Cedric Durand
Life of this patent
Estimating the term…
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.
Claims24
A transformer of the balanced-unbalanced type and comprising:
- a primary inductive circuit and a secondary inductive circuit;
- an additional inductive winding surrounding the primary and secondary inductive circuits and coupled in parallel to terminals of the secondary inductive circuit, and inductively coupled with the primary inductive circuit and the secondary inductive circuit, the additional inductive winding including a tap point configured to be coupled to a voltage source;
- and
- capacitors respectively coupled between terminals of the additional inductive winding and the terminals of the secondary inductive circuit.
1 more element
A wireless communication device comprising:
- a processing circuit;
- an antenna;
- and
- a transformer of the balanced-unbalanced type coupled between the antenna and the processing circuit, and comprising
- a primary inductive circuit and a secondary inductive circuit,
- an additional inductive winding surrounding the primary and secondary inductive circuits and coupled in parallel to terminals of the secondary inductive circuit, and inductively coupled with the primary inductive circuit and the secondary inductive circuit, the additional inductive winding including a tap point configured to be coupled to a voltage source, and
- capacitors respectively coupled between terminals of the additional inductive winding and the terminals of the secondary inductive circuit.
4 more elements
A method of making a transformer of the balanced-unbalanced type, the method comprising:
- forming a primary inductive circuit and a secondary inductive circuit;
- forming an additional inductive winding surrounding the primary and secondary inductive circuits and coupled in parallel to terminals of the secondary inductive circuit, and inductively coupled with the primary inductive circuit and the secondary inductive circuit, the additional inductive winding including a tap point configured to be coupled to a voltage source;
- and
- forming capacitors respectively coupled between terminals of the additional inductive winding and the terminals of the secondary inductive circuit.
1 more element
Dependencies are inferred from the claim text.