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51results about "Broad-band transformers" patented technology

Balun transformer, mounting structure of balun transformer, and electronic apparatus having built-in mounting structure

InactiveUS20080197963A1Reduce lossLarge coupling coefficientMultiple-port networksOne-port networksTransformerEngineering
There is provided a balun transformer, in which first to fourth layer coils are stacked and coupled magnetically; one end of each coil of the first to fourth layer coils is grounded; the second and third layer coils are connected in parallel, an unbalanced signal is input / output to / from a common terminal of the second and third layer coils; a first balanced signal is input / output to / from the other end of the first layer coil; and a second balanced signal is input / output to / from the other end of the fourth layer coil.
Owner:SONY CORP

Wideband planar transformer

A method of arranging and fabricating parallel primary and secondary coils of a wideband planar transformer is provided. The spacing and width of the coils are disposed to extend the bandwidth from DC to GHz and allow for high frequency coupling when the core permeability dramatically drops and achieves low reflected energy and low loss over a wide bandwidth. A bottom mold having a pattern of hole-pairs with conductive elements inserted vertically couples to a top mold such that a middle portion of the conductive elements spans between the top and bottom molds. Dielectric material envelopes the middle portion and a displacement feature of the mold creates a vacancy. A ferrite element is deposited to the vacancy. A second top mold spans the bottom mold and dielectric material is deposited to create a molded assembly. A deposited patterned conductive coating connects the element ends to define the transformer coils.
Owner:PLANARMAG

Laminated balun transformer

A laminated balun transformer includes first line elements which are connected in series through a relay terminal, to constitute an unbalanced transmission line. Other line elements each constitute a balanced transmission lines. Strip lines are electromagnetically coupled to constitute a coupler. Similarly, other line elements are electromagnetically coupled to constitute a coupler. A ground terminal is connected to the balanced transmission lines, which are constituted by a pair of the line elements. Meanwhile, a shield terminal is connected to leading portions of shield electrodes. These two terminals are electrically independent of each other.
Owner:MURATA MFG CO LTD

3-line balun transformer

A 3-line balun transformer includes an unbalanced port for an unbalanced signal, first and second balanced ports for balanced signals, the balanced signals being the same in level and 180 degrees out of phase with each other, a first line having its first end connected to the unbalanced port and its second end connected to ground, a second line arranged in parallel with the first line while being spaced apart from the first line, the second line having its first end and its second end connected to the first balanced port, and a third line arranged in parallel with the second line while being spaced apart from the second, the third line having its first end connected to the first end of the second line and its second end connected to the second balanced port.
Owner:SAMSUNG ELECTRO MECHANICS CO LTD

Balun

A balun comprises an unbalanced terminal, two balanced terminals, and two ground terminals. The balun further comprises: a low-pass filter provided between the unbalanced terminal and one of the balanced terminals; and a high-pass filter provided between the unbalanced terminal and the other of the balanced terminals. The low-pass filter incorporates two coils and a capacitor. The high-pass filter incorporates two capacitors and a coil. The coils and the capacitors are made up of conductor layers of a multi-layer substrate.
Owner:TDK CORPARATION

Balun transformer using a drum-shaped core

A balun transformer includes: a drum-shaped core having a core unit and a pair of flanges arranged on both sides of the core unit; a plurality of terminal electrodes arranged on the flanges; a primary winding wound around the core unit, both ends of the primary winding being connected to the terminal electrodes; and a secondary winding wound around the core unit, both ends and a center tap of the secondary winding being connected to the terminal electrodes, wherein the secondary winding includes a first wire extending from one end to the center tap, and a second wire extending from the other end to the center tap, and the first wire and the second wire are wound around the core unit so as to extend along each other.
Owner:TDK CORPARATION

Common-mode filter device and system

A common-mode filter device and system for regulating aspects of power conversion by a power converter from external source such as solar panels to another external circuit wherein the common-mode filter device substantially attenuates common-mode voltage at the switching frequency plus harmonics of the power converter. The power converter can be single phase, but is preferably a multiple phase.
Owner:KERRYJ INVESTMENT

Distributed balun with a non-unity impedance ratio

A mode-switching transformer having a first conductive line formed of two primary windings electrically in series, and the length of which is a function of a central operating frequency of the transformer; and a second conductive line formed of two secondary windings electrically in series, coupled two-by-two with the primary windings, the length of which is a function of said central frequency. The conductive lines exhibit different widths selected according to the desired impedance ratio of the transformer.
Owner:STMICROELECTRONICS SRL

Multilayer transformer component

A multilayer transformer component includes a chip body including a primary-side coil and a secondary-side coil, and first to fourth external electrodes. The primary-side coil includes a body portion, a first lead, and a second lead, and the secondary-side coil includes a body portion, a third lead, and a fourth lead. A first projection and a second projection of each body portion are arranged to lie substantially on a linear line. The first lead and the fourth lead are arranged to be line-symmetrical with respect to a center line which is arranged at an approximate center between respective distal ends of the first projection and the second projection, and which is perpendicular or substantially perpendicular to an overlying direction of the primary-side and secondary-side coils. The second lead and the third lead are also arranged to be line-symmetrical with respect to the center line.
Owner:MURATA MFG CO LTD

Integrated balun and transformer structure

A method for producing an on-chip signal transforming device. The method includes providing a substrate, and laying a first conductive layer above the substrate, wherein the first conductive layer has a plurality of interleaved inductors. The method then includes laying a second conductive layer above the substrate, wherein the second conductive layer has at least one inductor.
Owner:ATHEROS COMM INC

Multiple-wire winding method, multiple-wire winding device, and wound coil component

To provide a multiple-wire winding method, a multiple-wire winding device, and a wound coil component that make it possible to reduce both damage done to wires and the risk of short-circuits between said wires and electrodes at different potentials. In this winding method, starting sections of a plurality of wires are first guided from the outside of a flange on one end to the inside thereof and then laid out on top of and affixed to electrodes on said flange. The wires are guided laterally with respect to the axis of a core and are wound around a winding-core section together. Next, a wire-bending implement is made to contact a flat surface of a flange on the other end between a plurality of electrodes, ending sections of the wires are guided from the inside of said flange to the outside thereof, and the ending section of at least one wire is hooked between the wire-bending implement and the flange on the other end and bent with said wire(s) under tension. The ending sections of the plurality of wires are then affixed to the corresponding electrodes on the flange on the other end. By bending the wire ending section(s) laterally, the risk of short-circuits with electrodes at different potentials is reduced.
Owner:MURATA MFG CO LTD

Complex circuit, circuit device, circuit board, and communication device

PROBLEM: To provide a high-performance complex circuit, circuit device, circuit board, and communication device that support a wider band of frequencies.SOLUTION: A complex circuit includes a first diplexer that passes through the normal-phase signals of balanced signals and a second diplexer that passes through the reverse-phase signals of the balanced signals. A balun includes a low frequency band first balun element and a high frequency band second balun element. The first balun element and the second balun element respectively include a plurality of lines that are connected to the first diplexer and that carry signals occupying two different frequency bands and also respectively include a plurality of lines that are connected to the second diplexer and that carry signals occupying two different frequency bands. The lines form one pair of balanced lines, and the lines form another pair of balanced lines. Furthermore, the first balun element and the second balun element each include an unbalanced line.
Owner:TAIYO YUDEN KK

Layered type balloon transformer

A laminated balun transformer that may be applied to the lines having various impedances is provided. The laminated balun transformer includes a magnetic substrate 1, a laminated body 2, a magnetic substrate 3, and external electrodes 4-1 to 4-6. The laminated body 2 includes a first transformer 5, a second transformer 6, and an insulator 7 that covers the first and second transformers 5 and 6 from the outside. The first transformer 5 is formed of a primary coil 5-1 and a secondary coil 5-2. The second transformer 6 is formed of a primary coil 6-1 and a secondary coil 6-2. Then, the line width of the primary coil 5-1 of the first transformer 5 is set so as to decrease from the side of the internal electrode 52a toward the side of the internal electrode 51a. The line width of the secondary coil 6-2 of the second transformer 6 is also set so as to decrease from the side of the internal electrode 62a toward the side of the internal electrode 61a.
Owner:MURATA MFG CO LTD

Multiple-wire winding method, multiple-wire winding device, and wound coil component

[Problem] To provide a multiple-wire winding method and a multiple-wire winding device that make it possible to reduce both damage done to wires and the risk of short-circuits between said wires and electrodes at different potentials. [Solution] In this winding method, starting sections of a plurality of wires are first guided from the outside of a flange on one end of a core to the inside thereof and then laid out on top of and connected to electrodes on said flange. The wires are guided laterally with respect to the axis of the core and are wound around a winding-core section together. Next, a wire-hooking implement is inserted into a groove in a flange on the other end of the core, ending sections of the wires are guided from the inside of said flange to the outside thereof, and a tip section of the wire-hooking implement is used to hook the ending section(s) of at least one but not all of the wires and bend said ending section(s) while keeping the wire(s) under tension. The ending sections of the plurality of wires are then laid out on top of and connected to corresponding electrodes on the flange on the other end of the core. By bending the wire ending section(s) laterally, the risk of short-circuits with electrodes at different potentials is reduced.
Owner:MURATA MFG CO LTD

Electronic component-use substrate and electronic component

An object of the invention is to provide a substrate for an electronic part and an electronic part which have higher dielectric constant compared to conventional materials, which do not suffer from reduced strength, and which enjoy the advantages of small size, excellent performance and improved overall electrical characteristics; a substrate for an electronic part wherein the material used for the production exhibits reduced lot-to-lot variation in the electric properties, and in particular, in the dielectric constant, and wherein wearing of the mold in the production of the material has been suppressed; and an electronic part and an electronic part which have a high withstand voltage. In order to attain such object, the substrate for an electronic part and the electronic part are constituted to comprise a composite dielectric material wherein at least a dielectric material having a circular, oblate circular or oval projection shape is dispersed in a resin.
Owner:TDK CORPARATION

Digital isolator element

The embodiment of the invention discloses a digital isolator element. The digital isolator element comprises a first chip and a second chip electrically connected with the first chip. Wherein the first chip comprises a first substrate, a first circuit formed on the first substrate, an electromagnetic shielding structure covering the first circuit, and an isolation transmission structure arranged on the electromagnetic shielding structure; the second chip includes a second substrate separated from the first substrate and a second circuit formed on the second substrate. The first circuit is one of a coding circuit and a decoding circuit, the second circuit is the other one of the coding circuit and the decoding circuit, and the isolation transmission structure is used for transmitting coding signals in an electrical isolation mode. According to the digital isolator element, on the premise that the performance of a digital isolator is not affected, the utilization rate of a substrate is improved, the chip area is reduced, and the chip cost is reduced.
Owner:SILERGY SEMICON TECH (HANGZHOU) CO LTD

Magnetic Transformer Having Increased Bandwidth for High Speed Data Communications

An isolation transformer includes a transformer core. First and second through-bores extend through the transformer core from a first surface to a second surface. Each through-bore has an elongated profile with at least a portion of the elongated profile providing a respective flat winding surface. The flat winding surfaces are spaced apart by a central portion of the transformer core. The transformer is wound with a six-wire cable having a central non-conductive core. First, second, third, fourth, fifth and sixth conductive wires are positioned around and adjacent to the central non-conductive core in a substantially equally spaced angular relationship. The second conductive wire is positioned between the first conductive wire and the third conductive wire; and the fifth conductive wire is positioned between the fourth conductive wire and the sixth conductive wire. The conductive wires are twisted about the central non-conductive core at a selected twist density.
Owner:BEL FUSE MACAO COMML OFFSHORE

Iron-core material iron-core and transformer for balancing-non-balancing transformer

There is disclosed a BALUN transformer core material which has no magnetic permeability, contains a non-magnetic material and is not influenced by the frequency property of the magnetic permeability even in a high-frequency band. A BALUN transformer core which is obtained by pressing and sintering the BALUN transformer core material has no magnetic permeability and has a high specific resistance. A BALUN transformer which is obtained by applying a winding to the BALUN transformer core is a high-property BALUN transformer which can be operated in a high-frequency band of 600 MHz or more.
Owner:TDK CORPARATION

Laminated balun transformer

A laminated balun transformer that may be used for lines having various impedances includes a first magnetic substrate, a laminated body, a second magnetic substrate, and external electrodes. The laminated body includes a first transformer, a second transformer, and an insulator that covers the first and second transformers. The first transformer includes a primary coil and a secondary coil. The second transformer includes a primary coil and a secondary coil. The line width of the primary coil of the first transformer is set so as to decrease from the side of the internal electrode towards the side of the internal electrode. The line width of the secondary coil of the second transformer is also set so as to decrease from the side of the internal electrode towards the side of the internal electrode.
Owner:MURATA MFG CO LTD

Wide-frequency square-wave transformer for measurement and protection and manufacturing method thereof

The invention relates to a wide-frequency square-wave transformer for measurement and protection and a manufacturing method thereof. The square-wave transformer is used for measuring and protecting electrical parts and equipment and belongs to the technical field of electrical measurement and protection, comprising an iron core and a winding, wherein the iron core is of an R type iron core processed through vacuum high-temperature annealing, cooling and non-oxidation treatment; the size of the iron core is 2700-3000 square millimeters in area; the length of the magnetic path is 600-630 millimeters; and the winding comprises a first winding and a second winding. The transformer has the advantages of large variation range of working frequency value, square wave of voltage waveform, high requirement on precision, little distortion of waveform restoration, high grade of voltage withstand, high mechanical strength and good protective performance.
Owner:WUHAN PINGGAO NETWORK ELECTRIC
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