Abstract: An ignition coil for use in an internal combustion engine includes a primary coil, a secondary coil, a core, and a magnet. The core creates a closed magnetic circuit through which magnetic flux produced upon energization of the primary coil flows. The core has formed therein a gap through which the magnetic circuit passes. The magnet is disposed in the gap and has magnetic domains whose magnetization vectors are at least partially oriented obliquely relative to a gap direction. The orientation of the magnetization vectors in the magnet minimizes an energy loss when primary energy is transformed into secondary energy.

Abstract: A power converter device includes a first current level, a second current level, a first magnetic layer and a second magnetic layer. The first current level and the second current level are used to load a current loop which has AC current component. The current loop includes a power element module and a conductor coupled to the power element module. The power element module includes at least two electrodes. Voltage among the at least two electrodes is AC voltage. AC current magnitudes of the at least two electrodes are substantially equal and in the opposite direction. The first magnetic layer and the second magnetic layer are used to load a magnetic loop which includes AC magnetic flux component. The first magnetic layer and the second magnetic layer are disposed along two opposite sides of the first current level.

Abstract: Methods and systems are provided for maintaining combustion stability in a multi-fuel engine. In one example, a system may include first and second fuel systems to deliver liquid and gaseous fuels, respectively, to at least one cylinder of the engine, and a controller. The controller may be configured to supply the gaseous fuel to the at least one cylinder, inject the liquid fuel to the at least one cylinder to compression ignite the liquid fuel and combust the gaseous fuel in the at least one cylinder, and retard an injection timing of the injection of the liquid fuel based on a measured parameter associated with auto-ignition of end gases subsequent to the compression-ignition of the liquid fuel. In some examples, the controller may further be configured to adjust an amount of the gaseous fuel relative to an amount of the liquid fuel based on the measured parameter.

Abstract: A process for manufacturing a bicycle component and a bicycle component manufactured by the process. The process includes protecting a printed circuit board, inserting the protected printed circuit board into the mold cavity, inserting a composite material into the mold cavity so it is around and in contact with the circuit board, and subjecting the mold cavity to a temperature and pressure profile until the composite material hardens.

Abstract: An electromagnetic brake for an electric motor includes a brake core having a coil bobbin holder in which a coil bobbin is housed and a connector insertion hole into which a connector is inserted. The coil bobbin includes plural terminal casings in each of which a terminal is set. The terminal has a first contact, which creates a connection with a winding engaged in catches of the terminal casing with the terminal inserted in the terminal casing, and a second contact which contacts an electrode of the connector inserted in the connector insertion hole with the terminal set in place in the terminal casing.

Abstract: A method for manufacturing an ignition coil for an internal combustion engine includes manufacturing a containment body provided with a containment chamber, defining an internal volume, and with a lateral seat facing outwards, and preparing an electronic board provided with a first face and a second face, opposite the first. The electronic board is positioned inside said lateral seat and a polymeric material with high thermal conductivity is then printed on the electronic board so as to cover it.

Abstract: A first filler resin is disposed to cover at least an outer peripheral side of a secondary spool and a secondary coil. The second filler resin is filled inside a case and seals a cover sealant which includes a primary coil, secondary spool, a secondary coil, a center core, an outer core and the first filler resin. The connector protrudes to an outside of the case. The case has a fixing portion. The second filler resin has a lower elasticity than the first filler resin. The ignition coil is manufactured by filling the first resin inside the case, and filling the second resin after the first resin is cured.

Abstract: An ignition system for a vehicle includes an ignition coil and a thermoelectric cooler. The ignition coil has primary and secondary coils. The ignition coil is configured to deliver electrical power from a battery to a least one spark plug. The thermoelectric cooler is disposed along an external surface of the ignition coil and is configured to transfer heat generated by the primary and secondary coils to an ambient surrounding.

Abstract: A cylindrical part capable of supporting an ignition-coil-integrated plug cap is formed on a head cover so as to correspond to a plug hole of a cylinder head. The cylindrical part is formed by fitting and fixing a pipe material to a mounting hole part formed in the head cover, the mounting hole part facing the plug hole.

Abstract: An internal combustion engine ignition device comprises: a center core; a primary coil wound on the outside of the center core; a secondary coil wound on the outside of the primary coil; a permanent magnet which abuts against one end of the center core and is magnetized in the inverse direction to the direction of a magnetic flux produced by the energization of the primary coil; a side core which is disposed on the outside of the secondary coil with one end abutted against the permanent magnet and the other end abutted against the center core, the side core cooperating with the permanent magnet to form a closed magnetic path; and a heat-resistant and elastic resin covering the side core with an opening at an outer peripheral side. Heat dissipation from the side core to a housing is improved without adversely affecting the dielectric strength voltage of the secondary coil.

Abstract: A one-piece electrical contact ring for use in a lead receptacle of an implantable medical device includes (i) a tubular body defining a cavity extending through the body and (ii) a plurality of resiliently deflectable elements extending from the tubular body into the cavity. The deflectable elements have a lead contacting portion configured to contact the lead when received by the cavity. The lead contacting portions of the deflectable elements in a relaxed state are located in a plane that intersects the tubular body and are configured to deflect along the plane towards the tubular body as the lead is inserted in the contact ring. The contact ring may further include a plurality of stops, each configured to (i) engage a stop portion of the elements when the elements are sufficiently outwardly deflected and (ii) inhibit further outward deflection of the elements when the stops engage the stop portions.

Abstract: Semiconductor packages having nonspherical filler particles are described. In an embodiment, a semiconductor package includes a package substrate having a dielectric layer over an electrical interconnect. The dielectric layer includes nonspherical filler particles in a resin matrix. The nonspherical filler particles have an aspect ratio greater than one.

Abstract: This igniter assembly 220 includes: an igniter 2 provided with a lead terminal 20; a body 1 made of resin and storing the igniter 2; and an internal terminal 3 fixed to the body 1 and having one end electrically connected to the lead terminal 20. The internal terminal 3 has another end extending outward of the body 1.

Abstract: An ignition coil for an internal combustion engine includes: a center core arranged on an inner side of a primary coil and an inner side of a secondary coil; a side core arranged on an outer side of the primary coil and an outer side of the secondary coil, and combined with the center core to form a closed magnetic circuit; one or a plurality of gaps provided between the center core and the side core, or in the side core; and a magnet arranged in each of the one or a plurality of gaps, in which a sum of cross-sectional areas of the respective magnets is set to be three times or more and less than seven times of a cross-sectional area of the center core.

Abstract: An engine ignition coil assembly disclosed herein provides an ignition coil housing that may be mounted on an engine block assembly and that is isolated from engine vibrations. The engine ignition coil assembly comprises an ignition coil housing. The ignition coil housing contains an ignition coil apparatus. An electrical connector for the ignition coil apparatus is mounted to the ignition coil housing. An elastomeric boot supports the ignition coil housing and may be disposed on an engine block assembly such that ignition coil housing is spaced apart from the engine block assembly by the elastomeric boot. A single fastener extends through a fastener opening in the ignition coil housing parallel with the elastomeric boot. An elastomeric isolator is disposed on the ignition coil housing at the fastener opening around the single fastener. A proximal end of the single fastener may be fixed to the engine block assembly.

Abstract: The present invention relates to an ignition device for a gas cooking appliance, the ignition device comprising at least one ignition device module (10, 10A, 10B) with a primary voltage input terminal (20), a transformer, and at least one secondary voltage output terminal (24, 24A, 24B). The transformer is adapted to transform a primary voltage applied to the primary voltage input terminal into a secondary voltage at the secondary voltage output terminal, and the secondary output terminal is adapted to be connected to a spark electrode. According to the invention the ignition device module (10, 10A, 10B) further comprises a primary voltage output terminal (22).

Abstract: A magnetic core for inductor includes a first core segment, a second core segment spaced apart from the first core segment by a gap, and a spacer. The spacer is arranged within the gap and between the first core segment and the second core segment. The spacer includes a semi-conductive material to limit arc radius of magnetic flux lines communicated between the first core segment and the second core segment outside the gap. Inductors, flyback transformers and transformer rectifier units, and power conversion methods are also described.

Abstract: An ignition system for an internal combustion engine that utilizes a single primary coil and a single secondary coil to drive a pair of spark plugs. Current flowing in both a first direction and a second direction passes through the primary coil. The current flowing through the primary coil induces corresponding current in the secondary coil, which flows from the secondary coil to one of two spark plugs. Each spark plug is coupled to the secondary coil such that each of the two spark plugs receives current flowing only in a single direction. The current flowing through the ignition system can be from either a power source or created by the rotation of a flywheel having a series of magnet clusters.

Abstract: An inductor according to one embodiment includes a magnetic core, a case, a winding, and a resin. The case is configured to house the magnetic core. The winding is configured to be wound around the case. The resin is configured to be formed of a first resin to cover the case and the winding. A difference between an inside dimension of the case and a dimension of the magnetic core in the same direction is greater than a variation of a dimension of the case in the direction when forming the resin.

Abstract: An ignition coil for an internal combustion engine according to the present embodiment includes a primary coil, a secondary coil, a center core, an outer circumferential core, an igniter, a case, a connector unit, and a relay member. The relay member electrically connects the outer circumferential core and a grounding terminal member. The relay member includes: a base portion provided along the rear surface of an engagement wall; a standing portion standing rearward of the base portion; and a curved portion that extends from a rear end of the standing portion in a vertical direction Z orthogonal to a coil axis direction X and is curved to protrude rearward. The base portion is in contact with an inner grounding terminal at one end in the vertical direction Z. The standing portion is provided further outward than the igniter in a horizontal direction Y. The curved portion is elastically deformed and is urged against a front surface of the outer circumferential core.

Abstract: A spark detector indicates the presence of a spark by analyzing sound waves generated when an electrical spark is produced from an electrical spark generator located on an igniter rod. The spark detector includes an acoustic sensor that is in communication with the igniter rod to determine the time for the spark sound wave to travel through the igniter rod to the acoustic sensor. If a spark is not detected, the spark detector may output a signal indicating at least one of (i) the spark was not detected, (ii) to replace the electrical spark generator immediately, or (iii) replace the electrical spark generator soon such as at the next scheduled maintenance. Furthermore, the spark detector may be calibrated based on current temperature of the igniter rod based upon time of propagation of a pulse sound wave, generated by a pulse-echo generator, to reflect off an end of the igniter rod.

Abstract: An ignition apparatus includes a spark plug and an ignition coil. The spark plug has a plug terminal protruding proximalward from an insulator. The ignition coil includes a coil main body, which includes a primary coil and a secondary coil, and a helical spring that electrically connects the secondary coil and the plug terminal. The plug terminal is made of a material that is both electrically conductive and magnetic. The plug terminal includes a terminal main body, which has an outer diameter greater than an inner diameter of the spring, and a terminal extension portion that has an outer diameter less than the inner diameter of the spring and extends proximalward from the terminal main body. A distal end portion of the spring abuts the terminal main body. The terminal extension portion is inserted and arranged in the spring. Between an outer circumferential surface of the terminal extension portion and an inner circumferential surface of the spring, there is interposed an insulating member.

Abstract: A problem exists in that, as a loop through which high frequency energy conducts is long, it is difficult to suppress noise generated from the loop and suppress an influence thereof on peripheral equipment. A high frequency discharge ignition device according to this invention is a structure integrally constituted by a second housing into which a high frequency energy supply circuit is built and a first housing into which an output circuit is built, wherein the high frequency energy supply circuit is connected to the output circuit by a connection terminal so as to be connected to a spark plug which is mounted on a grounded object. Further, the high frequency energy supply circuit is grounded via a conducting member disposed in a through hole provided in the first housing.

Abstract: A power filter arrangement includes a toroidal package having a toroid and a resistive element. The resistive element is disposed about an outer circumference of the toroid and is joined to the toroid. The resistive element is wound about the toroid. The resistive element is provided with a first resistive pattern having an even number of total turns.

Abstract: Some embodiments relate to a clip comprising: a base portion; first and second opposed arms coupled to the base portion; and first and second opposed jaws coupled to the respective first and second arms, the first and second opposed jaws each having an inwardly extending portion that extends towards the base portion; wherein at least the base portion is formed of a shape memory alloy tending to force the first and second arms toward each other when a temperature of the base portion meets or exceeds a transformation temperature of the base portion.

Abstract: In an ignition coil for an internal combustion engine, a coil case includes a housing section and a high-voltage tower section. The housing section houses a primary coil, a secondary coil, a center core, and an outer peripheral core, and is arranged outside a plug hole in a cylinder of an internal combustion engine in which an ignition plug is arranged. The high-voltage tower section protrudes from the housing section, and is disposed within the plug hole. A pole joint is disposed within the plug hole, and is mounted to the high-voltage tower section via a seal rubber. The pole joint is provided with a rib that protrudes to an outer periphery and faces an inner peripheral surface of the plug hole. The inner peripheral side of the rib faces the high-voltage tower section via the seal rubber.

Abstract: In an ignition coil for an internal combustion engine, a resistor is disposed in a tower insertion hole of a high-voltage tower section. A coil spring is inserted in the tower insertion hole. An inner diameter of a proximal end side portion of the tower insertion hole is larger than an outer diameter of a maximum outer diameter portion of the resistor. An inner diameter of the distal end side portion of the tower insertion hole is larger than an outer diameter of a proximal end side portion of the coil spring, and is smaller than the outer diameter of the maximum outer diameter portion. In a state where the coil spring is pulled out from the tower insertion hole, the maximum outer diameter portion is restrained by the distal end side portion of the tower insertion hole, and a gap is formed between the resistor and a high-voltage cap.

Abstract: An extender for connecting a high-voltage source to a spark plug has a spring adapted to electrically connect with the high-voltage source and the spark plug, a tube having said spring positioned within an interior passageway thereof, and a boot affixed over an exterior of the tube. The boot is formed of a material having a rigidity less than a rigidity of a material of the tube. The boot has a first end adapted to be connected with the high-voltage source and a second end adapted to be connected to the spark plug such that the spring is in direct electrical connection with the spark plug and the high-voltage source. The tube has one end that is spaced inwardly of the first end of the boot and an opposite end of the spaced inwardly of the second end of the boot.

Abstract: There is provided a signal splitter comprising at least four outputs and a plurality of step-up transformers, wherein each step-up transformer has less than seven turns. A first step-up transformer is connected to a common port and positioned between the input and second and third step-up transformers. The first step-up transformer has a different number of turns to the second and third step-up transformers.

Abstract: An ignition coil for internal combustion engines is provided which includes magnetically coupled primary and secondary coils, a case, a high-voltage tower, a resistor, and resin packed in the case. The case has the primary coil and the secondary coil disposed therein. The high-voltage tower is attached to a tower mount formed on a front end of the case. The resistor is embedded in the high-voltage tower with a front and a base end surfaces thereof exposed from the high-voltage tower. The resin is packed in the case to seal the primary coil and the secondary coil. This structure enhances the productivity of an assembly of the high-voltage tower and the resistor.

Abstract: A reluctance motor includes a ferromagnetic seat, a non-magnetic sleeve sleeved on the seat, a magnetizing coil wound around the sleeve, a magnetic core surrounding the sleeve, a ferromagnetic cover covering the sleeve, and a ferromagnetic pseudo piston partly disposed in the sleeve and axially movable relative to the sleeve.

Abstract: An ignition coil for internal combustion engines is provided which includes a primary and a secondary coils magnetically coupled with each other, a case, a resistor, and a resinous filler. The case includes a case body in which the primary and secondary coils are disposed and a tubular high-voltage tower extending from the case body toward a head of the ignition coil. The resistor 3 is press-fitted into the high-voltage tower and electrically connected to the secondary coil. The resinous filler is packed in the case body to hermetically seal the primary coil and the secondary coil. The resistor includes a resinous coating which covers an outer circumference of the resistor and is press-fit in the high-voltage tower through the resinous coating. This facilitates hermetically sealing a gap between the resistor body and the case and ensures the stability of the sealing.

Abstract: An ignition coil assembly with extension for electrical connection of an ignition plug of an endothermic engine, wherein the extension (10) comprises an essentially tubular hollow body (11) having a first end area (10.1) engaged, in a detachable manner, on the free end of an ignition plug, and electrical connections (10.26, 20, 10.36), provided for the transmission of high voltage electrical energy between an electrical/electronic member of the ignition coil and the ignition plug. The electrical connections (10.26, 20, 10.36) comprise at least one filter (20) of the high frequency electromagnetic disturbances produced by the operation of the coil, wherein a winding of electrically conductive wire surrounds a central core (20.3) in ferromagnetic material dispersed in a polymer base.

Abstract: The invention relates to a corona ignition device for igniting fuel in a combustion chamber of an engine by means of a corona discharge, said corona ignition device comprising an insulator, a center electrode, which is held in the insulator, a housing, in which the insulator is held, and coil turns, which are disposed in a cylindrical main part of the housing and are connected to the center electrode. According to an aspect of this disclosure, the housing widens on the side of the main part remote from the insulator and further coil turns are disposed there, in a wider housing part.

Abstract: The invention relates to corona ignition device comprising a housing, an insulator surrounded by the housing, an inner conductor leading through the insulator to an ignition tip, and a coil connected to the inner conductor, the coil comprising an elongate coil former and a winding formed from wire wound onto the coil former, wherein the coil former comprises at least one indentation filled with adhesive, and the wire crosses the indention such that wire portions which are arranged above the indentation are adhesively bonded to the coil former by means of the adhesive arranged in the indentation.

Abstract: A drive apparatus includes a power module, a connector and a heat sink. The connector is used for electric connection to an external side and has a flange, which is formed on its peripheral wall. The heat sink is formed to have a module holding part for holding the power module and a fitting hole for fitting with the flange and has a connector holding part for holding a connector. The flange is formed along a first surface, which faces the connector holding part of the peripheral wall, and side surfaces, which are formed on both sides of the first surface. Thus, water droplets are prevented from entering into a control unit through a clearance between the connector and the heat sink without adding other members such as a water preventing cover.

Abstract: The following invention relates to an ignition coil assembly for an ignition system comprising an ignition coil where said assembly has a main axis and is configured for insertion into and/or removal out of a well associated with an internal combustion engine, wherein the assembly comprises an elongated extension body made of flexible material, said extension body comprising an upper end portion and a lower end portion wherein the extension body is arranged to be transversally bendable in relation to the main axis so that the upper end portion and the lower end portion may assume an angle (?) in relation to each other.

Abstract: An ignition system is provided, which can restrict decreasing of constant-voltage duration of a spark plug and effectively prevents the occurrence of an accidental fire in an engine. A typical ignition system includes a secondary coil having one end connected to a positive side of a battery via a low-voltage side path and the other end connected to a center electrode via a connecting path which connects the secondary coil and the spark plug. A constant-voltage path having a grounded end is connected to the connecting path. A block diode is arranged between the secondary coil and a point where the constant-voltage path is connected with the connecting path. A Zener diode is disposed within the constant-voltage path. Each anode of the block diode and the Zener diode is mutually connected.

Abstract: In an ignition coil for an internal combustion engine, a column section and a notched section are provided in a side wall section of a case section of the ignition coil. A ventilation opening is formed in an up/down direction in the column section. The ventilation opening communicates with a ventilation passage formed between a sealing rubber and the case section and is open in an upper end section. A cover surrounding the column section and covering the upper end section is provided in the side wall section. A sealing section sealing the notched section is provided in the cover. The ignition coil has a filler resin that fills a space within the case section being in continuous contact with the sealing section and the side wall section and fixing the cover to the side wall section.

Abstract: An ignition coil for an internal combustion engine includes a magnetically-permeable core extending along a core longitudinal axis, the core having a pair of end surfaces on axially-opposite ends thereof. The ignition coil also includes a primary winding disposed outward of the core, a secondary winding disposed outward of the primary winding, and a structure comprising magnetically-permeable steel laminations having a base and a pair of legs, the structure defining a magnetic return path. The core is disposed between the pair of legs such that the core longitudinal axis extends through the legs and the end surfaces face toward the legs and at least one of the end surfaces of the core is spaced apart from a respective one of the legs to define an air gap. The structure is over-molded with an over-molding material such that the over-molding material fills at least a portion of the air gap.

Abstract: An outboard motor includes an engine and a casing. The engine includes a cylinder unit, ahead cover and an ignition coil device. The cylinder unit is made of metal. The head cover is made of resin and is attached to the cylinder unit. The ignition coil device is attached to the head cover. The casing is made of resin and covers the engine. The coil ignition device includes a radiated noise reducer portion. The radiated noise reducer portion is configured to reduce noise that is radiated from the ignition coil device.

Abstract: Ignition is performed in such a way that a bias voltage is applied to a first electrode of an ignition plug and a current detection device detects a current that flows in the first electrode, that based on the value of the detected current, a smolder level detection device detects the level of a smolder produced in the ignition plug, and that a control device controls, based on the detected smolder level, at least one of the timing of ignition, the number of ignition events per power stroke of an internal combustion engine, and the amount of energy accumulated in an ignition coil device.

Abstract: An ignition coil for the internal combustion engine has a cylinder portion and a head portion. A pillar portion that forms a part of a ventilation passage that communicates inside and outside of a plug hole via a sealing member, and a cover portion that covers the pillar portion without blockading an upper opening of a ventilation opening of the pillar portion are formed on a side of the head portion.

Abstract: An ignition coil for internal combustion engine includes: a center core disposed on an inner side of a primary coil and a secondary coil and a side core disposed on an outer side of the primary and secondary coils whose one end face abuts on one end face of the center core and the other end face abuts on the other end face of the center core via a magnet. The side core is formed of a plurality of side core portions obtained by dividing laminated magnetic steel plates at different positions in a longitudinal direction thereof and has a superimposed portion in which the magnetic steel plates of the adjacent side core portions mutually superimpose between the different positions in the longitudinal direction. It thus becomes possible to provide an ignition coil for internal combustion engine capable of suppressing an increase of magnetic circuit resistance markedly without deteriorating assembly workability.

Abstract: An ignition coil for an internal combustion engine is provided with a coil section that includes a primary coil and a secondary coil, and a connector case section. The primary coil is formed by winding a primary electric wire about the outer periphery of a primary spool made of a resin. The connector case section is provided with terminals each formed of a conductor and arranged from a fitting hole of the connector case section to a connector portion. In each terminal, an insertion portion arranged in the fitting hole is formed with an insertion slit in a fitting direction in which the coil section is fitted to the connector case section. Each winding end portion is drawn out substantially along a winding direction of the primary electric wire and inserted into the insertion slit in the fitting direction.

Abstract: In a spark plug ignition assembly for a spark plug, an ignition coil assembly has a steel laminated core, said core having a first core portion and a second core portion, and a primary winding around the first core portion and a secondary winding around the primary winding. A spark plug connecting member is provided for connecting the coil assembly to the spark plug. At least one of the first and second core portions has a slot therein with a magnet located in the slot.

Abstract: In accordance with one embodiment, an ignition coil assembly includes an ignition coil cover, a boot, and an ignition coil. The ignition coil cover includes a plurality of fins, an opening, and a channel. The boot includes a slotted opening and a centralized orifice and is configured to be disposed within the opening of the ignition coil cover. The ignition coil includes a seat and a tab. The ignition coil is configured to be disposed within the centralized orifice. The seat is capable of supporting the ignition coil within the centralized orifice of the boot. The tab is configured to be inserted into the slotted opening and the channel when the ignition coil is disposed within the centralized office and the boot is disposed within the opening.

Abstract: A corona igniter 20 includes a coil 24 with a plurality of copper windings 26 extending longitudinally along a coil center axis ac. A magnetic core 30 is disposed along the coil center axis ac between the windings 26 and includes a plurality of discrete sections 32. The discrete sections 32 are spaced axially from one another by a core gap 34 filled with a non-magnetic gap filler 78. The magnetic core 30 has a core length lm and the coil 24 has a coil length lc less than the core length lm. A coil former 62 having a former thickness tf spaces the coil 24 from the magnetic core 30. A length difference ld between the core length lm and the coil length lc is preferably equal to or greater than the former thickness tf.

Abstract: The invention relates to a corona ignition device for igniting fuel in an internal combustion engine by means of a corona discharge, comprising a central electrode, an insulator, into which the central electrode plugs, a housing, into which the insulator plugs, a bobbin, onto which a coil which is attached to the central electrode is wound, and a shield cap, which is plugged onto an end portion of the bobbin facing the insulator. According to the invention, a portion of the central electrode protrudes through a bottom of the shield cap, or a circumferential wall of the shield cap has one or more slots, or the shield cap has a circumferential wall, which protrudes only on one side beyond the bottom of the shield cap only on one side.

Abstract: An ignition coil apparatus for high-frequency discharge includes: a primary coil that generates and accumulates a flux; a secondary coil that is magnetically coupled to the primary coil so as to generate a predetermined high voltage when energy of the accumulated flux is released and connected at one end to a high-voltage terminal used to supply energy to an external apparatus; a capacitor that is connected to the high-voltage terminal and prevents passing of the high voltage; and an inductor that, together with the capacitor, allows passing of a predetermined frequency component alone. The primary coil, the secondary coil, the capacitor, and the inductor are installed within a same package.