Back to results
US 8,576,037 B1Granted
Dual output autotransformer
AssigneeScientific Components Corporation
InventorDaxiong Ji
Life of this patent
Estimating the term…
Abstract
A dual output autotransformer is realized by employing a novel topology in which three transformers are wound on a single, high permeability, ferrite, binocular core. The three transformers are (1) an autotransformer; (2) a coupled winding to the autotransformer; and, (3) a transmission line transformer. Within the topology employed, the outputs of the coupled line transformer and the transmission line transformer provide the balanced output (secondary) and the input to the autotransformer forms the unbalanced primary. Such an approach results in a wideband response of from 30 MHz to 3000 MHz or greater with the requisite amplitude and phase balance.
Claims20
A dual output autotransformer comprising:
- an autotransformer winding having an input, a ground and a tap-off;
- a transmission line transformer having an in-phase secondary output, an electrical connection to said tap-off, and two grounds;
- said autotransformer winding having a coupled winding thereto providing an out-of-phase secondary output;
- said coupled winding further having a ground;
- a binocular core having a first leg, a second leg, a third leg, a first aperture and a second aperture;
- said transmission line transformer being wound around said first leg and through said first aperture, said transmission line transformer further comprises a twisted pair having a first wire and a second wire;
- and,
- said autotransformer winding and said coupled winding being wound around said third leg and through said second aperture, said autotransformer and said coupled winding further comprise a twisted triplet wire having a third wire, a fourth wire, and a fifth wire.
5 more elements
A dual output autotransformer comprising
- an autotransformer winding having an input, a ground and a tap-off;
- a transmission line transformer having an-in-phase secondary output, an electrical connection to said tap-off, and two grounds;
- said autotransformer winding having a coupled winding thereto providing an out-of-phase secondary output;
- said coupled winding further having a ground;
- a binocular core having a first leg, a second leg, a third leg, a first aperture and a second aperture, said binocular core secured to a substrate comprising:
- a 6 lead header is secured substrate by means of a chipbonder adhesive;
- said transmission line transformer being wound around said first leg and through said first aperture;
- and,
- said autotransformer winding and said coupled winding being wound around said third leg and through said second aperture;
- a substantially planar lid secured on top of said binocular core for handling by standard robotic pick and place machinery.
7 more elements
A dual output autotransformer comprising:
- an autotransformer winding having an input, a ground and a tap;
- a transmission line transformer having an in-phase secondary output, an electrical connection to said tap, and two grounds;
- said autotransformer winding having a coupled winding thereto providing an out-of-phase secondary output;
- said coupled winding further having a ground;
- a binocular core having a first leg, a second leg, a third leg, a first aperture and a second aperture;
- wherein said core is made from high permeability ferrite material;
- said transmission line transformer being wound around said first leg and through said first aperture;
- said autotransformer winding and said coupled winding being wound around said third leg and through said second aperture;
- said transmission line transformer further comprises a twisted pair wire having a first wire and a second wire;
- said autotransformer winding and said coupled winding further comprises a twisted triplet wire having a third wire, a fourth wire and a fifth wire;
- said twisted pair wire and said twisted triplet wire is twisted with approximately 7 twists per inch;
- said twisted pair wire is wound approximately 3.5 turns around said first leg;
- said twisted triplet wire is wound approximately 1.5 turns around said third leg, said fifth wire is separated out from said triplet wire, and said third and fourth wires are wound approximately a further two turns around said third leg;
- said fifth wire is said input;
- said twisted pair wire comprises 34 gauge conductors and said twisted triplet wire comprises 36 gauge conductors;
- said binocular core is secured by means of a chipbonder adhesive to a substrate comprising a 6 lead header;
- said 6 lead header has a conductive bonding pad for each lead and said wires are welded to said conductive bonding pads;
- a substantially planar lid is secured on top of said binocular core, thereby providing means for handling by standard robotic pick and place machinery;
- and,
- wherein the overall assembled dimensions are no greater than approximately 0.15 inch×0.15 inch×0.15 inch.
17 more elements
Dependencies are inferred from the claim text.