Single bobbin transformer having multiple delink windings and method of making same
AssigneeGeneral Instrument Corporation
InventorGeorge L. Schauble
Life of this patent
Estimating the term…
Abstract
A symmetrically wound signal transformer having a first primary coil portion wound in one groove on a bobbin and a first secondary coil portion wound in an adjacent groove on the bobbin. A second primary coil portion, of shorter length than the first primary coil portion is wound in a reverse direction in the groove containing the first secondary coil portion. Likewise, a shorter second secondary coil portion is wound in a reverse direction in the groove containing the first primary coil portion. The respective second coil portions serve as decoupling windings.
Claims13
A miniaturized signal transformer comprising:
- a coil form;
- a continuous primary winding having a first primary coil portion wound in one direction in a first area of said coil form and a second primary coil portion, of fewer turns than said first primary coil portion, wound in an opposite direction in a second area of said coil form adjacent said first area;
- and
- a continuous secondary winding having a first secondary coil portion wound in one direction in said second area concentric with said second primary coil portion, and a second secondary coil portion, of fewer turns than said first secondary coil portion, wound in an opposite direction in said first area concentric with said first primary coil portion.
A method of making a transformer comprising the steps of:
- winding, in one direction, a first primary coil portion in a first area of a coil form;
- winding, in the opposite direction, a second primary coil portion of fewer turns than said first primary coil portion, continued from said first primary coil portion, in a second area of said coil form adjacent said first area;
- winding, simultaneously with and in the same direction as the winding of said first primary coil portion, a first secondary coil portion in said second area;
- and
- winding, simultaneously with and in the same direction as the winding of said second primary coil portion, a second secondary coil portion of fewer turns than said first secondary coil portion, continued from said first secondary coil portion, in said first area.
Dependencies are inferred from the claim text.