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JP3309798 |
To provide a transformer by which a sufficient sound pressure characteristic is obtained from a low frequency band to a high frequency band without decreasing a volume of a piezoelectric material by improving sufficiently a coupling degr...
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JP2002141228 |
To obtain a stabilized high-frequency transformer.In the high-frequency transformer, a primary coil 23 and a secondary coil 24 are formed in parallel coupled lines in one plane, and the remaining primary coil 30 and the other secondary c...
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JP3305997 |
To provide a magnetically-biased electromagnetic induction device which can exhibit a high efficiency and can lighten inductive trouble even when used in a high frequency circuit. Since magnetic-bias applying means 12 provided on a side ...
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JP3306365 |
To reduce magnetic coupling among a plurality of elements formed on a core by applying windings to the left and right legs of a core having substantially spectacle-shape cross-section, formed by abutting a pair of cores each having three...
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JP3298917 |
PURPOSE: To provide a split winding bobbin that realizes a small and reliable transformer, by improving the strength at a tooth part and preventing a short circuit caused by contact between coils. CONSTITUTION: In a split winding bobbin,...
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JP2002118023 |
To provide an small transformer which is equipped with a cover and keeps a sufficient creeping distance between a terminal and a core, capable of lowering its height, even if it is required to widen a winding part or to narrow a pin pitc...
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JP3299639 |
PURPOSE: To enable a surface-mounting coil to be easily lessened in cost, size, and weight by a method wherein recesses are provided to a magnetic core, and flat plate-like terminals are fixed to the recesses. CONSTITUTION: Winding secti...
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JP2002110437 |
To provide a highly efficient power unit which is improved in efficiency and reduced in thickness, weight and cost by finding the spot at which the magnetic flux generated from the coil of a primary-side circuit can be transmitted effici...
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JP2002110427 |
To provide a ceramic circuit element which can obtain high reliability without requiring connection between conductors through via holes and can be manufactured easily.This ceramic circuit element is formed in such a way that a plurality...
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JP2002093628 |
To provide a high-voltage semiconductor switch, capable of driving easily at a low drive circuit voltage and durable at high voltages easily.A pulse transformer made up of a plurality of secondary windings 2, wound radially around an ann...
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JP2002093633 |
To provide a transformer that is reduced in size, easily wound with wirings, and moreover with improved efficiency and high degree of binding between the wirings.A core 1 is formed into a shape of a bar and provided with two windings 5, ...
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JP2002093613 |
To provide a transformer magnetic core material which is suitable for a transformer magnetic core of a modem used in a high-speed data communication, such as ADSL and which is superior in THD characteristics over a wide frequency band.Th...
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JP2002083722 |
To provide an inductor and a transformer where a permanent magnet for applying a magnetic bias is arranged in the air gap of a magnetic core, and which can reduce influences of the magnetic field of a excitation coil on the permanent mag...
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JP2002075741 |
To reduce the size and manufacturing cost of a surface mounting-type transformer.In the surface-mounting type small-sized transformer provided with an upper core (1), a lower core (3), and a winding coil (2), the upper and lower cores (1...
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JP2002075744 |
To provide a laminated multicoil type thin molded transformer which is used for switching power units used for various kinds of electronic equipment, can be manufactured with high productivity, and has highly quality, and to provide a me...
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JP2002075742 |
To solve the problem that conventionally the frequency band which can be used by a balanced transformer is not able to be adjusted once the balanced transformer is manufactured and the transformer must be redesigned, when the usable freq...
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JP2002057043 |
To provide a transformer and a reactor which uses FINEMET (R) and are compact and excellent in efficiency and whose cooling efficiency is high and insulation strength is large.A circular FINEMET core 1 is pinched by insulation plates 2 o...
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JP2002057042 |
To eliminate difficulties of lamination in the conventional method that two coil elements of about 3/4 turn are arranged coaxially on a sheet and they are laminated by turning 90°, and to solve such a problem that a transformer with a v...
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JP2002057035 |
To eliminate the trouble to laminate green sheets on which two coil elements that are of nearly 3/4 turn and arranged in a concentric manner have been formed respectively, rotating each green sheet by an angle of 90°, and to solve a pro...
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JP2002052644 |
To provide an electronic part which shows a high wavelength shortening effect, an excellent high frequency characteristic, is small-sized and shows a high performance and excellent overall electronic properties by combining a plurality o...
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JP2002050910 |
To provide a balun element having desired coupling characteristics, even if positional deviation occurs during a laminating process.At least one of coupling lines 14c, 14d and coupling lines 14e, 14f is set to be larger than the other in...
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JP2002043882 |
To provide a balanced transformer, which is miniaturized, widens a frequency band to be used and can prevent occurrence of migration.Between an unbalanced terminal 11 and a dummy terminal 14, coils L1 and L2, having the same number of tu...
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JP3275972 |
PURPOSE: To secure insulation by covering conductors of printed coils with cover lay and to provide a small-size print coil-type transformer. CONSTITUTION: This is about a print coil-type transformer which has a primary- side print coil ...
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JP3274695 |
PURPOSE: To reduce transmission loss with coupling efficiency increased by providing no magnetic materials between the counter faces of coil patterns of first and second conductor layers. CONSTITUTION: A first magnetic material layer 1a ...
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JP2002033216 |
To provide a laminated balun transformer, wherein a favorable coupling can be obtained in a wide band extending to a high frequency than a GHz.A laminated balun transformer is constituted in a structure that non-magnetic material layers ...
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JP2002025826 |
To provide a method for reducing the size of a transformer mounted on small-sized communication equipment, typified by modems, etc., without lowering the characteristics of the transformer.This transformer uses a magnetic core, which is ...
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JP3269371 |
To reduce the number of parts and decrease the number of working steps in a sheet transformer used for various electronic apparatuses. A spiral coil 12 made of punched thin conductor plates is arranged on an insulative film 13a having a ...
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JP3270812 |
To make it possible to provide insulation between an electronic stage of high sensitivity and a related power stage by providing a high-frequency pulse transformer for IGBT gate driving device with a primary winding wound around a core o...
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JP2002015927 |
To enable an insulated converter to be reduced in size.A primary coil pattern and a secondary coil pattern 6 are arranged coaxially on sheet boards that form a circuit forming multilayered board 4, and a core member 11 is provided to a c...
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JP3263022 |
To provide a linearity coil which is structure for easy mounting and reducing harmful leaking magnetic fluxes, by simplifying an assembling process so as to lower a height as an electronic component and a center of gravity. A pedestal 4 ...
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JP2001345216 |
To provide a broadcast wave distributor transformer device which is reduced in assembly man-hours as much as possible, improved in connection reliability, and can be prevented from being mismatched in impedance by a simple method.Signal ...
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JP2001332426 |
To enhance manufacturing yield after resin coating by enabling maintaining the reproducibility of the wound body shape (in particular, inner- diameter-side end part), in a magnetic core which uses a thin wound body.This thin magnetic cor...
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JP2001319815 |
To provide a signal input and output device which can input high-frequency signals into an electric wire through which a large current having a low frequency, such as the commercial frequency, etc., is made to flow at a stable level and ...
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JP3248373 |
PURPOSE: To obtain a layer-built coil product having a pair of coils having equal impedances and difficult to generate a leakage flux. CONSTITUTION: A layer-built transformer 1 is composed of an insulator sheet 2 having coil conductors 4...
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JP2001307929 |
To provide a small transformer which is capable of coping with a lead-free solder and improving a lead wire tying operation and a lead wire tying method.Projection 6 are provided to the outer edge face of a flange 2 on which pin terminal...
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JP3246431 |
To provide winding parts for transformer which can be reduced in thickness, without deteriorating the high-voltage withstand properties of their winding starting and ending wires. The insertion guiding groove 10 of the drum core of a dru...
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JP2001297925 |
To provide a coil bobbin which has improved insulation between a lead wire and a core and high reliability, and a transformer and a cholk coil using the same. A terminal block 7 is provided with a plurality of pins 1 and 2 erected in the...
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JP2001291621 |
To provide a transformer, in which the creeping distances between a transformer core and transformer pins can be secured sufficiently, without having to increase the size of the transformer. A creeping distances L from the transformer pi...
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JP3240905 |
To downsize a transformer by extending and winding an end of a metallic foil with a lead terminal connected, covering a connection of the lead terminal connected to the metallic foil with the metallic foil and separating other metallic f...
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JP2001274020 |
To provide a boosting circuit which can highly efficiently boost a voltage, a transformer which can be used suitably in the boosting circuit, and a coil and a coil unit which can be used suitably in the transformer. The spirally wound co...
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JP2001267156 |
To realize downsizing and cost reduction of an inverter transformer having a closed magnetic circuit structure which turns on a plurality of cold cathode lamps (has nor variation of discharging operation among a plurality of cold cathode...
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JP2001267139 |
To provide a transformer for communication which can transmit high-frequency signals with a low loss.This transformer for communication is constituted by winding a multiconductor parallel cable (10), in which a plurality of conductors ar...
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JP3233313 |
PURPOSE: To produce a nano-crystal allay excellent in pulse decay characteristic by heat-treating an amorphous alloy foil and forming a fine crystal grain structure which is composed essentially of bcc phase and partially contains Fe-B c...
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JP2001244118 |
To provide a small balun transformer circuit.The small balun transformer is provided with a primary and secondary conductor loops. These loops are respectively provided on a substantially plane spiral structure. However, one of the loops...
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JP3228068 |
PURPOSE: To provide a method for producing a high quality thin plate punching coil being employed in electronic apparatus while sustaining the insulation and a transformer employing such coil. CONSTITUTION: The method for producing a thi...
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JP2001237128 |
To provide a shell type power transformer which can prevent an uneven magnetization as a problem in practical use and uses a no-cut thin-band wound magnetic core which has a low magnetic core loss and is compact, and a highly efficient a...
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JP3223425 |
To obtain a transformer in which stray capacitance and leakage inductance can be decreased. A first group of conductive patterns a1-a5 constituting the primary winding of a transformer and a second group of conductive patterns b1-b5 cons...
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JP3219586 |
PURPOSE: To provide a choke coil which can be used for both a normal mode and common mode and is improved in normal-mode noise inhibiting characteristic without lowering the common-mode noise inhibiting characteristic. CONSTITUTION: A ch...
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JP2001211649 |
To provide a transformer for rectification for higher harmonies optimal as a low-voltage, large-current power supply wherein diodes of small capacity can be used by branching large current and fluctuation in output voltage can be reduced...
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JP2001210526 |
To provide a surfaced-mounted ballun coil, capable of preventing magnetic flux leakage of a twining lead part of a winding, where the outer terminals are flat and direct current resistance will not increase, and that can further be attac...
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