Abstract: A ferrite bead is placed in series with a terminating resistor on a transmission line such as a clock transmission line. In lower frequency ranges where the ferrite bead is substantially not effective, the transmission line will be effectively terminated by the resistor. In higher frequency ranges where the resistor is substantially no longer effective, the transmission line will be terminated by the ferrite bead. In one aspect, the resistor and ferrite bead are provided in a single surface mount package.

Abstract: In a noise removing filter for removing the electromagnetic wave noise leaking from an electronic equipment to the outside via a connector throughhole through which a connector passes, the noise removing filter includes a magnetic member filled in a gap between a body of the electronic equipment and the connector to cover the circumference of the connector.

Abstract: A feed-through EMI filter includes a hollow outer conductor, an inner conductor passing through the outer conductor, and a composite magnetic material of magnetic metal flakes disposed between the outer conductor and the inner conductor. Both ends of the outer conductor are closed by insulating lids supporting the inner conductor in a feed-through arrangement. The composite magnetic material has a higher complex relative permeability at GHz frequencies than ferrites and produces a large insertion loss.

Abstract: A printed-wiring board is incorporated into an electronic device housing constructed of a conductive member, and has a ground pattern. A metal plate having a size equal to or larger than the printed-wiring board is disposed in a position facing to the printed-wiring board. The metal plate has a characteristic impedance corresponding to an electric characteristic and a relative position to the printed-wiring board. A connecting member electrically connects the ground pattern of the printed-wiring board to the metal plate, and includes an impedance element having a value substantially equal to the characteristic impedance between the printed-wiring board and the metal plate. An occurrence of radiant noises caused by standing-waves etc. is thereby prevented.

Abstract: An in-line and ninety degree filter assembly is provided in the present invention for coupling a coaxial cable thereto. The coaxial cable has a coaxial wire disposed therein. The filter assembly includes a filter body that has a first end and a second end spaced apart from the first end. A circuit board is secured within the filter body for filtering electrical signals received from the coaxial cable. The circuit board includes a center coax in electrical and mechanical communication with the circuit board and a ground lead connected to the circuit board and protruding therefrom for electrically and mechanically communicating with the filter body upon installation of the circuit board into the filter body such that the circuit board is electrically grounded to the filter body.

Abstract: A filter apparatus includes a housing having a first body portion and a second body portion which mate together to enclose an accessible inner portion of the housing. Filtering elements disposed within the inner portion filter signals transmitted through a pair of signal carriers which pass through the inner portion. A pair of guides disposed within the inner portion maintain the electrical conductors in a predetermined positional relationship with certain of the filter elements. The guides are each actuated by placing a signal carrier against a predetermined portion of the guide and applying manual pressure against the signal carriers to cause the signal carrier to be pressed into a the predetermined positional relationship. Certain embodiments include contact push posts which pierce an insulating layer of a corresponding signal carrier to make electrical contact with the signal carrier. Other embodiments include a cutting element to sever the signal carriers to implement a four-terminal filter.

Abstract: A monolithic planar filter capacitor assembly includes a dielectric substrate, a plurality of through-holes, sets of interleaved ground and active electrodes and, within at least some of the through-holes, discrete capacitor structures electrically connected to one of the sets of interleaved electrodes.

Abstract: A planar filter connector is disclosed for the transmission of signals to be passed in and out of an EMI shielded enclosure. The EMI enclosure has walls the free ends of which are provided with an electrically conductive, resilient gasket. The filter connector is located on a conductive pad on a printed circuit board and is positioned under a portion of one of the walls, the gasket being depressed to accommodate the filter connector. The connector consists of a planar conductor surrounded by high dielectric material and further surrounded by two planar metallization layers. One metallization layer is in electrical contact with the gasket and the other metallization layer is in contact with the conductive pad. Shielding through the connector is maintained by the capacitance created between the conductor and each of the metallization layers.

Abstract: A capacitive filter feedthrough assembly and method of making same are disclosed for shielding an implantable medical device such as pacemaker or defibrillator from electromagnetic interference or noise. A ferrule is adapted for mounting onto a conductive device housing by welding, soldering, brazing or gluing, and supports a terminal pin for feedthrough passage to a housing interior. A capacitive filter is mounted at the inboard side of a device housing, with capacitive filter electrode plate sets coupled respectively to the housing and the terminal pin by an electrically conductive combination of adhesive, brazing and soldering. In one embodiment of the invention, multiple capacitive filters are provided in an array within a common base structure, where each capacitive filter is associated with a respective terminal pin.

Abstract: In junction boxes for coupling T.V. signals and low frequency power waves on a coax line to a plurality of users, the T.V. signals are coupled via connections in a first compartment to a plurality of coax cables, and the low frequency power wave are coupled via low pass-filters to IDC connections in a second compartment.Leads from users are passed through a chamber on the wall of the second compartment containing a self-healing, self-supporting insulating substance and attached to the IDC connectors. The IDC connectors permit the lead to be paired through them so that an installer can know when the leads are properly partitioned.

Abstract: It is the object of the invention to suppress electromagnetic radiation caused by the ground potential of a printed-circuit board, which now becomes an important problem, as the bit-rate of digital signals increases. The ground-pattern of an electronic circuit mounted on the printed-circuit board is connected to the shield-case of an electronic circuit apparatus via a conductor-piece, noise generated by the electronic circuit is by-passed, and electromagnetic radiation of noise from a cable connected to the printed-circuit board via a connector can be suppressed.

Abstract: An interchangeable, plug-in, in-line module for attenuating electrical noise wherein a plurality of plug-in terminals are electrically coupled to an attenuating circuit in the form of a filter network array including a plurality of discrete components electrically interconnected by conductive traces or printed circuits formed on an insulating board to facilitate a plug-in connection to an electrical system. The attenuating circuit is electrically connected to a conductive retainer which is adapted to receive and retain a plastic motor end cover therein and to make electrical contact with a conductive frame member of the motor. The attenuating circuit includes four ferrite choke beads each having axial through holes or bores through which through-connectors of the terminals pass. The choke beads are supported by an insulating carrier so that the through-connectors can be electrically coupled to the conductive traces.

Abstract: An electromagnetic interference (EMI) filter capacitor assembly is provided for shielding and decoupling a conductive terminal pin or lead of the type used, for example, in an implantable medical device against passage of external interference signals. The EMI filter is constructed of relatively inexpensive ceramic chip capacitors which replace relatively expensive feedthrough capacitors as found in the prior art. The chip capacitors are mounted directly onto a hermetic feedthrough terminal in groups of two or more which vary in physical size, dielectric material and capacitance value so that they self-resonate at different frequencies. This "staggering" of resonant frequencies and direct installation at the hermetic terminal provides the EMI filter with sufficient broadband frequency attenuation. In one preferred form, multiple chip capacitor groupings are mounted onto a common base structure, with each capacitor grouping associated with a respective terminal pin.

Abstract: A feedthrough ceramic capacitor having a grounding fitting provided in a part of a housing of the capacitor is mounted to a filter box by being forced into the latter through an insertion hole of the filter box. Since a corrugated edge is provided around the entire circumference of the insertion hole provided in the filter box, the feedthrough ceramic capacitor can be forced into the filter box easily. Further, because no gap is generated between the filter box and the grounding fitting, high-frequency noise in the inside of the filter box never leaks to the outside.

Abstract: A common mode filter with a choke portion and an electrical isolation portion is made up of two core members, each core member having two legs. A first winding is wrapped around the first leg of the first core member to form a first coil of the isolation section, but the secondary coil of the isolation section and both coils of the choke section are formed by a single winding which may be a single wire or may include a portion connected through a circuit board. The ends of the second winding may be shaped so as to form the mating sections of a pair of RJ contacts, while the ends of the first winding may be shaped to form pins for insertion into openings in a LAN interface card, the core structures being positioned in a rear chamber of an RJ connector.

Abstract: A capacitive filter feedthrough assembly and method of making the same are disclosed for shielding an implantable medical device such as pacemaker or defibrillator from electromagnetic interference or noise. A ferrule is adapted for mounting onto a conductive device housing by welding, soldering, brazing or gluing, and supports a terminal pin for feedthrough passage to a housing interior. A capacitive filter is mounted at the inboard side of a device housing, with capacitive filter electrode plate sets coupled respectively to the housing and the terminal pin by an electrically conductive combination of solder and brazing. In one embodiment of the invention, multiple capacitive filters are provided in an array within a common base structure, where each capacitive filter is associated with a respective terminal pin.

Abstract: A capacitive filter feedthrough assembly and method of making the same are disclosed for shielding an implantable medical device such as pacemaker or defibrillator from electromagnetic interference or noise. A ferrule is adapted for mounting onto a conductive device housing by welding, soldering, brazing or gluing, and supports a terminal pin for feedthrough passage to a housing interior. A capacitive filter is mounted at the inboard side of a device housing, with capacitive filter electrode plate sets coupled respectively to the housing and the terminal pin by electrically conductive adhesive or brazing, or a combination of adhesive and brazing. In one embodiment of the invention, multiple capacitive filters are provided in an array within a common base structure, where each capacitive filter is associated with a respective terminal pin.

Abstract: A material which possesses both capacitive and inductive properties for suppressing electromagnetic interference is provided, wherein the material is a composite of a ferroelectric material and a ferromagnetic material. The ferroelectric-ferromagnetic composite material is formulated and processed so as to retain the distinct electrical properties of the individual constituents according to the relative quantities of the constituents present in the ferroelectric-ferromagnetic composite material. As a unitary composite element, the ferroelectric-ferromagnetic composite is readily formable to provide a compact electrical filter whose filtering capability is highly suitable for suppressing electromagnetic interference from sources internal and external to an automotive environment. The sintered composite has a very low porosity; interconnectivity between the ferroelectric and ferromagnetic phases; and has no chemical reaction between the ferroelectric and ferromagnetic phases to produce a third phase.

Abstract: An LC filter member has at least one coil-shaped conductor wire, an insulating layer formed on the outer surface of the coil-shaped wire and a conductive layer formed on the outer surface of the insulating layer. One end of the coil-shaped conductor wire is substantially electrically connected to a cathode terminal, and the other end of the coil-shaped conductor wire is substantially electrically connected to a high frequency electric supply. The conductive layer is grounded.

Abstract: The present invention is an improved filter assembly for providing at least common-mode filtering.

Abstract: A ground connecting pattern of the printed circuit board is separated by forming a spiral circuit pattern element onto a printed circuit board. The separated ground connecting patterns are electrically connected by an electric part, thereby suppressing radiation noises of the printed circuit board.

Abstract: An improved ceramic feedthrough capacitor design which results in distinct advantages in EMI (electromagnetic interference) filtering and therapeutic waveform management for implantable defibrillators and pacemakers and the like. The invention provides ceramic capacitor electrode plate designs which provide both low impedance decoupling for EMI suppression, and, at the same time provide an isolated common ground point through a separate coupling capacitor for electrical isolation of the filtered circuit from the metal case (usually titanium) of the defibrillator or the like. Such an arrangement allows the defibrillator HV (high voltage) output pulse to the heart to be referenced lead to lead (including reverse polarity), or from either lead to a common floating ground point or to the titanium case. The primary application of the invention is directed to implantable defibrillators where the output pulse to the heart is typically high voltage (up to 750 volts) and of short duration (typically in the 10.times.

Abstract: A method of manufacturing a pi filter (24) includes a ferrite sleeve (26) providing an inductance coating the sleeve with a dielectric material (36) and plating (28-34, 38) to define spaced capacitive regions (R) on the sleeve with a signal conductor (18) soldered (S) to the inside plating (28) of the sleeve and a ground circuit (22) soldered (S') to the outside of the sleeve with the platings serving as electrodes for capacitances C of the filter. Multiple filters (24) are taught in use in an electrical connector (10).

Abstract: A filtered feedthrough assembly (100, 100', 100", 200, 200", 300) for use in implantable medical devices is provided. The filtered feedthrough assembly provides at least one chip capacitor (110, 210) or an LC circuit coupled between a lead wire (12) and an end surface (18) of a metallic ferrule (14). The chip capacitor is secured in position by means of a [non-conductive film (122) and] conductive material (120) applied to opposing ends of the chip capacitor. The end portion of the feedthrough and chip capacitor may be encapsulated by an encapsulant (102) to provide a moisture resistant coating therefor.

Abstract: An electro-magnetic interference suppressor includes a segmented array of ceramic feed-through capacitors, and a conductive fence which is attached to the capacitor array about its periphery. The fence is attached to a ground of a printed circuit board such that a generally planar surface of the segmented array lies adjacent to a planar surface of the printed circuit board. The suppressor provides an effective filter for eliminating unwanted noise occurring in electronic circuitry. The fence, in one embodiment, is surface mounted and soldered to a surface ground pad of the printed circuit board. In another embodiment, the fence includes a ground pin which extends into printed circuit board for contact with the circuit board ground. The ground pin may be soldered in place or may include a compliant section for press-fit reception within a through-hole.

Abstract: A solderless filter circuit disposed in an electrical connector assembly for filtering electrical signals carried by conductors in the connector assembly including, without solder connections, low cost capacitive and inductive circuit elements providing reliable electrical connection with the conductors, for example in a Pi filter configuration for low pass signal filtering in a convenient filter package. Integrated capacitor elements include modified electrical leads in the form of conductor seats and are packaged with a ferrite block in at least one housing retained within at least one of two mating connectors.

Abstract: One embodiment of a filter plug includes a plug body being constructed as a filter element and being made of insulating material, and a number of parallel plug pins being disposed in a set pattern and being surrounded by the plug body. Another embodiment of a filter plug includes a plug body being made of a compound material having a mixture of insulator and ferrite material, and a number of parallel plug pins being disposed in a set pattern and being surrounded by the plug body. The plug body of the filter plug is made of a mixture of insulating material and ferrite powder in order to suppress undesired interference, such as radio frequency signals. The filter plug may be a pin connector, a blade connector or a jack connector.

Abstract: An electromagnetic shield providing for input/output signal paths includes: a carrier 101 having a shielding surface 103 that has electromagnetic shielding properties; a plurality of signal paths 107 mechanically coupled to the carrier 101; a plurality of filtering elements 109 corresponding to the plurality of signal paths 107 and electrically coupled, respectively, from the plurality of signal paths 107 to the shielding surface 103; and an enclosure 101 constructed from a material having electromagnetic shielding properties and having a perimeter edge 113 that is arranged and constructed to electrically couple the enclosure 111 to the shielding surface 103 at an interface so as to sandwich the plurality of filtering elements 109 between the perimeter edge 113 and the shielding surface 103 at the interface such that the plurality of signal paths 107 pass through the interface.

Abstract: A filter circuit for reducing electromagnetic interference in an ungrounded hree-phase delta electrical system. The filter circuit includes a low- pass filter associated with each power phase having one input and output terminal placing an inductor in series with a phase conductor from a power supply. Input and output capacitors connect to a second input and output terminals respectively. An inductor connects in common between the second input and second output terminals thereby to complete a loop that is isolated from ground. Voltage suppression circuits connect from each phase to ground on the input side of the filter.

Abstract: A bulkhead mounting plate for EMI filter units formed along three of its edges into alternating fingers. The fingers can grip the inside and outside surfaced of an edge port or a notch in a box. The plate is shaped by a right angle bend of a fourth edge and perforated with precision mounting holes appropriate to any specified application. Fingers on the mounting plate are dimpled to concentrate spring pressure between them and the box to improve the efficiency of electrical contact of the filter to be mounted on the plate.

Abstract: The electrical connector comprises a housing having contact receiving passages with contacts disposed therein. Recesses are disposed along a mounting face of the connector and are defined by walls therealong. The recesses are in communication with the contact receiving passages. A rigid ground bar is disposed along sidewalls of the housing. Chip capacitors are positioned in the recesses to have one electrode electrically connected with the contact and the other electrode to be electrically connected with the ground bar. The chip capacitor provides a low impedance pathway for EMI from the contact to the ground.

Abstract: A filtered connector has an outer metal shell within which extend several electrical contacts. Primary capacitors of tubular shape have their inner plates electrically connected to the contacts. The primary capacitors extend through holes in a metal board to which their outer plates are electrically connected. The board is insulated from the outer shell of the connector apart from a single secondary capacitor connected between the board and the shell. The secondary capacitor is larger than the primary capacitors, so that it is capable of withstanding higher voltages, but it has a lower value of capacitance.

Abstract: An electrical connector assembly includes two mating multiposition electrical connector halves 2, 4 and an insert 10 which is positioned in engagement with the terminals 8 in one of the connector halves. The insert is fabricated from a lead frame 16 which is secured between an insulative substrate 40 and a cover 48. Portions of the lead frame 16 extending into slots 44 and channels 52 on the substrate and cover are punched out to separate connecting tabs 26 from ground buses 18, 20, 22. Surface mount capacitors 38 are soldered to both the solder tab sections 30 on the connecting tabs and to solder contact sections 34 on the ground buses. The insert 10 is then positioned on the terminals 8 on one connector half with the tines 32 in a terminal socket 28 on each connecting tab 26 engaging the terminals 8.

Abstract: An electrical connector is provided with a sealing grommet which provides an environmental seal as well as a cushioning shock absorber for a ferrite filter.

Abstract: Filter unit for connectors comprising at least a substrate (2) made of electrically insulating material and having two mutually opposite sides and through openings (3) for contact elements of the connector, capacitors being situated at least one of the two sides of the substrate in the region of the through openings, which capacitors each comprise at least one first conducting layer (5) in contact with the substrate, a dielectric layer (7) and a second conducting layer (9) and there being provided above each of the capacitors a cover layer (13, 22) composed of at least one first flexible layer (13) substantially covering the top surface of each of the capacitors and having a low moisture absorption coefficient and a high moisture diffusion coefficient and a second hard layer (22) at least entirely covering the first flexible layer and having a high moisture absorption coefficient and a low moisture diffusion coefficient.

Abstract: A structure for the shielding of electronic components from outside electromagnetic fields is to be designed in such a way tha a single printed circuit board serves both to separate a "polluted" space from a "clean" space and to accommodate the components of the device to be shielded itself. To this end, the printed circuit board has a first region which is provided with an internal, grounded conductive coating, and a second region which carries the electronic components to be shielded. A housing forms a shielding partition which extends to the printed circuit board and has an end face engaging the printed circuit board between the first and second regions. The first chamber is limited by the first region of the printed circuit board. Shielding for blocking electromagnetic fields are provided in the printed circuit board adjacent partition. These shielding extend transversely to the surfaces of the printed circuit board.

Abstract: A material which possesses both capacitive and inductive properties for suppressing electromagnetic interference is provided, wherein the material is a composite of a ferroelectric material and a ferromagnetic material. The ferroelectric-ferromagnetic composite material is formulated and processed so as to retain the distinct electrical properties of the individual constituents according to the relative quantities of the constituents present in the ferroelectric-ferromagnetic composite material. As a unitary composite element, the ferroelectric-ferromagnetic composite is readily formable to provide a compact electrical filter whose filtering capability is highly suitable for suppressing electromagnetic interference from sources internal and external to an automotive environment. The sintered composite has a very low porosity; interconnectivity between the ferroelectric and ferromagnetic phases; and has no chemical reaction between the ferroelectric and ferromagnetic phases to produce a third phase.

Abstract: The invention provides improved high voltage, low pass filtering connectors. The connectors described herein comprise an assembly having a low impedance path to ground for use in the connector. The assembly comprises a plurality of circuit elements which contribute a fixed amount of impedance to the ground path, a printed circuit board adapted to house the circuit elements, the printed circuit board further having a corresponding plurality of traces in electrical communication with the plurality of circuit elements wherein the traces are adapted to minimize in-line insertion loss to the circuit elements, and a plurality of ground planes in the printed circuit board electrically interfaced in the ground path for providing a low impedance path to ground for the signals bussed to the connector. Connectors described herein ensure efficient low pass filtering of signals at frequencies above the resonant frequency of the connector.

Abstract: An electronic feed-through system that is adapted for use in situations in which the feed-through is bonded to a container or the like by a process that subjects the feed-through system to heating. The feed-through system includes an electrically conductive structure adapted to be attached to a second structure at a first location on the conductive structure. The conductive structure has an electrically conducting member connected to the first location. A portion of the conductive structure is subjected to heat during said attachment. The feed-through system also includes an electronic component such as a feed-through capacitor. The electronic component requires electrical connection to the conducting member and placement in proximate spaced relation to the conducting member. An electrically conducting thermally resistant bridge is used to connect the electronic component to the conducting member and maintain the component in the spaced relationship with the member.

Abstract: A plug and socket connector, particularly with filtering and/or shielding, is composed of two connector halves, for examples, a female or male multi-point connector and a printed circuit board or the like. The base member of one connector half has pin-like connecting elements and the base member of the other connector has corresponding receiving openings or spring contacts. Between always two receiving openings for contacts, a metal-coated cutout is provided. In an electric plug-type connection, the receiving openings of the base member receiving the pin-like connecting elements are provided with a suitable metal contact.

Abstract: This invention is directed to an improved system for reducing crosstalk in an electrical connector, where a typical connector is a multi-contact electrical connector comprising a pair of intermatable connector members, where each connector member is adapted to be terminated to plural conductors. A typical connector comprises a housing formed of an insulative material having a conductor receiving side, a mating side, and a plurality of contact receiving cavities extending from the conductor receiving side to said mating side. The cavities are arranged in rows on a spaced-apart parallel axes, where adjacent rows are separated by an insulative housing wall. An array of electrical contact terminals are provided in the cavities. A preferred system hereof is the provision of an electronic device in the form of a thin dielectric film, having plural discrete electrically conductive traces along a first surface thereof, where the first surface is arranged adjacent the insulating wall underlying the contact terminals.

Abstract: A multi-terminal filtered electrical connector assembly includes a housing having a plurality of terminal-receiving passageways. A plurality of terminals are received in the passageways, with tail portions of the terminals projecting from the housing. A flexible capacitor filter circuit is mounted on the housing and through which the terminals extend. A ferrite block is provided with a plurality of through holes for receiving therethrough portions of the terminals. A terminal alignment plate may be provided for mounting the ferrite block. A second flexible capacitor filter circuit may be provided through which portions of the terminals extend. The ferrite block may be disposed between the two flexible capacitor filter circuits. The housing is constructed for mounting on a printed circuit board to provide either a right angle connector or a direct mounted connector.

Abstract: A filtered coaxial connector is provided including an insulated housing, a conductive connector shell concentrically surrounding a center conductor, a ferrite cylinder concentrically located around a portion of the conductive shell and a leadless chip capacitor, one contact of which is electrically connected to the conductive shell. A solid metal washer is electrically connected with the second contact of the chip capacitor. When installed in an enclosure, the metal washer is additionally in contact with the enclosure panel, connecting the capacitor between the connector shell and the enclosure panel. Electrically, the ferrite cylinder is connected in series with the capacitor, thus forming an impedance divider. Common-mode noise generated within the enclosure is applied to this impedance divider, and is shunted through the capacitor to the chassis. As such, common-mode noise generated within the enclosure is attenuated before being permitted to spread throughout the network, via an attached coaxial cable.

Abstract: The present invention is directed to an improved electrical connector of the type disclosed in U.S. Pat. No. 3,760,335. Though the invention hereof is not limited to the specific construction of such prior art connector, it exemplifies the type of electrical connector that can be modified by the teachings of this invention. Such connector comprises a pair of intermatable housing members, where each said housing member is adapted to be terminated to plural conductors. Each housing is formed of an insulative material and includes a conductor receiving side and a mating side, a plurality of contact receiving cavities extending from the conductor receiving side to the mating side. The cavities are arranged in rows on spaced-apart parallel axes, where adjacent rows are separated by an insulative housing wall.

Abstract: A distributed element filter member (10) comprises a semi-conductor member (12) having a composite dielectric layer (24) disposed on and secured to a first major surface (16) of the member (12), the layer (24) being comprised of a polymerized dielectric material made of either barium titanate or strontium titanate particles in various ranges of mixture; a conductive layer (34) is disposed on portions of the dielectric layer defining an outer ground conductor and an inner conductive layer (36) is disposed on a second major surface of the semi-conductor member defining a signal conductor. The polymer utilized may be selected from an aqueous solution containing acrylic styrene as a copolymer or a solid polyester dissolved in carbitol acetate, or a solid bisphenol A-based epoxy resin dissolved in butyl carbitol acetate with various mixtures of barium or strontium titanate utilized. A filter (12') embodiment includes three layers of polymerized material.

Abstract: A feedthrough filter capacitor assembly and related installation method are provided for shielding a conductive terminal pin or lead of the type used, for example, in an implantable medical device such as a heart pacemaker or defibrillator, against passage of external interference signals. The feedthrough assembly includes a terminal pin subassembly having at least one terminal pin supported within a cylindrical conductive ferrule by a hermetically sealed insulator ring. The ferrule is adapted for mounting onto a conductive pacemaker housing, as by welding or brazing, to support the terminal pin for feedthrough passage to the housing interior. A co-axial filter capacitor is mounted at an inboard side of the pacemaker housing, with capacitor electrode plate sets coupled respectively to the pacemaker housing and to the terminal pin by a conductive adhesive or the like.

Abstract: A connector has been designed that incorporates a ground EMI/RFI shield spacer in conjunction with an attached grounded multi-coplanar capacitor board to achieve an EMI/RFI tight grounded connection. The shield spacer may be provided with further RF suppression core members which surrounds all of the signal lines and power connections connected via the plug.

Abstract: A capacitor array for filter connectors includes a stamped and formed ground resilient metal plate. Integral tines are provided to establish a solderless electrical connection between the plate and a connector shell. The filter elements are discoidal capacitors having cylindrical inner and outer electrode portions. The filter assembly is completed by soldering the outer electrode portions to the ground plate, while a solderless electrical connection between the inner electrodes and the feedthrough contacts of a connector is established by providing compliant sections on the contacts. A pi filter array is formed using two of the ground plates.

Abstract: A microminature down converter for satellite communications has a structure in which high frequency circuit printed boards (5) are respectively arranged on peripheral four surfaces of a box made of a die-casting and a power printed board (1) for supplying power to each of said high frequency circuit printed boards is disposed on a surface opposite to an input portion of a wave guide tube, whereby power supply to each of the high frequency circuit printed boards (5) is performed not through lead wires. Therefore, electromagnetic couplings occurring between printed boards are prevented and electromagnetic couplings between high frequency signals occurring in the printed boards and lead wires are also prevented, so that it is possible to restrain occurrence of undesired waves.

Abstract: A filter insert (40) includes filters (43) having electrodes (48, 60) and contacts (54, 64) axially, mechanically engaging contact post members (28) of a connector (20) to provide filtering extending between signal and ground conductors in the form of connector contacts to filter unwanted signal frequencies. An alternative insert (68) includes filters (69) having slotted beam elements (78) that engage post members (28) from a side thereof with a common ground bus (90) tying the filters to ground. A further alternative insert (108) provides contact elements (116) connecting filters (103) to signal and ground conductors in the form of the wires (104) of a cable (102). The contact elements (54, 64, 78, 116) of the inserts (40, 68, 108) bite into the signal and ground conductors or contacts of a connector or a cable to provide a solderless interconnection of the insert. Filters, including dielectric elements (56, 86, 126,) and inductive elements (44) are contemplated to provide C, LC and pi-filters.