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EP0517952A2 - Connecteur électrique multipolaire pour lignes de signaux électroniques - Google Patents

Connecteur électrique multipolaire pour lignes de signaux électroniques Download PDF

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Publication number
EP0517952A2
EP0517952A2 EP91119122A EP91119122A EP0517952A2 EP 0517952 A2 EP0517952 A2 EP 0517952A2 EP 91119122 A EP91119122 A EP 91119122A EP 91119122 A EP91119122 A EP 91119122A EP 0517952 A2 EP0517952 A2 EP 0517952A2
Authority
EP
European Patent Office
Prior art keywords
signal lines
filter
base plate
electrode
connector according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP91119122A
Other languages
German (de)
English (en)
Other versions
EP0517952B1 (fr
EP0517952A3 (en
Inventor
Bernhard Plass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FILTEC GmbH Filtertechnologie fuer die Elektronikindustrie
Original Assignee
FILTEC GmbH Filtertechnologie fuer die Elektronikindustrie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FILTEC GmbH Filtertechnologie fuer die Elektronikindustrie filed Critical FILTEC GmbH Filtertechnologie fuer die Elektronikindustrie
Priority to CA002071122A priority Critical patent/CA2071122C/fr
Priority to JP15526892A priority patent/JPH06181080A/ja
Publication of EP0517952A2 publication Critical patent/EP0517952A2/fr
Publication of EP0517952A3 publication Critical patent/EP0517952A3/de
Application granted granted Critical
Publication of EP0517952B1 publication Critical patent/EP0517952B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/719—Structural association with built-in electrical component specially adapted for high frequency, e.g. with filters

Definitions

  • the invention relates to a multipole connector with a housing provided with at least one conductive shell, through which lines, in particular digitized signals, run and in which a planar filter is arranged on a base plate, with capacitors provided for at least some of the signal lines, which are formed by a on the base plate applied base electrode, on which a dielectric layer and on which in turn a counter electrode is applied, wherein one of the electrodes, continuously formed as a ground electrode, divided with the housing and the other of the electrodes into individual signal electrodes, conductively connected to the signal lines and wherein the base plate and the dielectric layer and at least one of the electrodes have cutouts for the passage of the signal lines.
  • Multipole connectors are used in electronics, in particular in data processing, to transmit signals from one electronic unit to another, e.g. from a first computer to a second computer.
  • the signals are transmitted as pulses with a (relatively) high pulse train via the cables connected to the devices, this transmission being disturbed by the computer's pulse trains, which are much higher in the MHz range, with pulse edges corresponding to even higher frequencies, so that the range of the transmission is reduced especially via parallel interfaces.
  • the interference fields in the environment also contribute to the interference, the electromagnetic interference fields, more or less attenuated by shielding measures, also cause interference signals that lead to errors in the signal transmission.
  • multipole connectors In order to eliminate these interferences, in particular the internal interferences coming from the device, multipole connectors have already been proposed, for example in US Patents 2,841,508, 3,200,355, 3,447,104, 3,538,464 and the French publication 78.10242.
  • a planar filter essentially formed of capacitors is installed in the multipole connector, the capacitors being connected from the signal line to the ground electrode and representing low-pass filters.
  • a ceramic carrier is provided with a first electrode which is electrically connected to the housing, to which an insulating layer is applied, which forms the dielectric of the capacitor, and which in turn has a counter electrode which is conductively connected to the signal line is applied.
  • difficulties arise here which are to be found in mechanical stresses between the carrier and especially the dielectric layer as a result of un different coefficients of expansion.
  • the invention comes in, which is based on the object of further developing such filter inserts that they, in the multipole Integrated plug-in as low-pass filter, are able to withstand temperature differences without failures;
  • the multi-pole connectors are to be further developed into pi filters, which reliably filter out high-frequency interference.
  • the filter has a capacitor for each of the pins of the signal lines, the base electrode applied to the base plate made of aluminum oxide or ferromagnetic ceramic having further cutouts in the area of the leadthroughs for the signal lines, through which the dielectric layer is anchored to the material of the base plate via bridges in connection therewith.
  • This configuration ensures that each of the signal lines is provided with a capacitance which leads to the ground electrode and which alone is capable of acting as a low-pass filter.
  • the anchoring of the material of the dielectric layer, generally a titanate, for example barium titanate, on the aluminum oxide or ferromagnetic ceramic carrier is made possible by the recesses in the area of each of the pin recesses, by direct material contact between these two layers is made.
  • a ferromagnetic ceramic increases the longitudinal inductance of the signal line running through the ceramic carrier, so that the low-pass effect is enhanced.
  • the further recesses of the base electrode surround the feedthrough recess like a grid; in addition, it is proposed that at least some of the further cutouts lie on the center line of two adjacent feedthrough cutouts.
  • This arrangement of the anchoring points around the signal line bushing increases their symmetry, improves the manufacturability and thus also the resistance to temperature changes.
  • Structures of this type are produced by the production processes customary in thick-film technology, for example by coating by means of screen printing processes or by means of Photolithography by applying photoresist, exposing with a template having the structure and loosening and / or etching the unexposed areas, the further cutouts surrounding the feedthrough cutouts or the feedthrough electrodes and also being arranged between them.
  • the metallization, which forms the common electrode is guided down to at least one edge of the base plate and the metallization, which forms the individual electrodes connected to the signal lines, into lead-through recesses to form corresponding contact strips.
  • This expansion of the metallization on the insulating carrier creates a simple possibility of establishing the electrically conductive connection between the electrode acting as the signal electrode of the capacitor and the signal line to be connected, for example by means of a dip-soldering process.
  • the metallization, which forms the common electrode is guided down to at least one preferably metallized edge of the base plate to form a corresponding contact strip; in another, likewise preferred embodiment, the metallization, which forms the individual electrodes connected to the signal lines, is guided down to the individual lead-through recesses for the signal lines to form corresponding contact strips.
  • an arrangement is created which can be contacted in a simple manner.
  • the metallization of the edge strip is carried out by means of solder paste customary in screen printing technology, so that the edge is also melted when the individual electrodes are soldered to the signal lines, and thus forms a complete coating. It is advantageous if this melted metallization is additionally coated with a conductive varnish. With this gapless lacquer coating it is achieved that the filter insert thus prepared can also be inserted into a carrier with good contact if there are dimensional deviations or slight deformations caused by temperature fluctuations.
  • a metallic filter carrier provided with contact tongues is provided for receiving the planar filter, where the contact tongues press on the preferably metallized edges of the base plate of the planar filter to make electrical contact with the common electrode produce.
  • the filter carrier can be inserted in a form-fitting manner in at least one shell of the two-shell housing of the multipole connector in such a way that the metallic filter carrier and the shell of the housing are electrically conductively connected.
  • This training allows a simple manufacture of the finished planar filter, which is then (or in the event of a failure due to replacement) inserted into the metal carrier, which in turn is then inserted into the metallic housing or into one of its half-shells and via the contact tongues and / or the clamping in the shell with this and thus with the common ground electrode is electrically connected without the need for soldering.
  • the elasticity of the contact tongues and / or the metallic shell bridges dimensional deviations, e.g. due to thermal expansion.
  • the contact is made by applying or pressing onto a conductive insert, for example made of an electrically conductive plastic or rubber or the like. provided, which is arranged between the metallic filter carrier and the planar filter.
  • a conductive insert for example made of an electrically conductive plastic or rubber or the like.
  • the planar filter is placed on this electrically conductive insert, and when the filter carrier is closed, it is also pressed or pressed, so that a reliable and sufficient contact is provided for the purposes of the filter.
  • the conductivity of this insert is advantageously in the range of 10 3 S. it if the insert is designed as a circumferential frame.
  • the surface contact with the elastic insert ensures reliable contacting, which is retained even with dimensional deviations caused by thermal expansion.
  • planar filter used in the filter carrier is provided with a cover made of non-conductive plastic or rubber, which is provided with through holes for the signal lines and is arranged on one or both sides.
  • contact is made via the contact tongues, which are in direct contact with the filter housing, or via the electrically conductive insert.
  • the planar filter and in particular the capacitors are protected by this cover, which forms a support, in particular against impacts.
  • the base electrode applied to the base plate is continuous up to the preferably metallized edge of the base plate and forms the contact strip on the edge, which acts as a ground electrode with the filter carrier is connectable, while the counterelectrode applied to the dielectric layer for each signal line in the area of its bushings is drawn approximately in a cup-like manner up to the surface of the base plate and is guided into the bushings as a contact strip for connecting to the signal lines, the in the base electrode for the Recesses provided in the connecting bridges surround the signal lines carried out approximately at a distance in a grid-like manner.
  • the base electrode applied to the base plate, provided with the lead-through recesses and the further cut-outs is subdivided into individual electrodes and, in the regions of the leadthroughs, leads into these, the contact strips of the signal electrodes for connection to the Signal lines forms, while the counterelectrode is designed as a continuous ground electrode in the edge areas, approximately like a cake sheet pulled up to the height of the base plate and guided on its preferably metallized edge forms the contact strip and can be connected to the filter carrier, the recesses provided in the counter electrode surrounding the signal lines at a distance.
  • the electrode which is applied flat on the carrier, is designed as a ground electrode which is led to the edges of the base plate, the signal electrodes form individual “islands” which surround the pins of the signal lines.
  • the ground electrode is applied to the dielectric
  • the signal electrodes which here also form “islands” around the pins of the signal lines, rest on the base plate and have an approximately lattice-like structure. The individual distances ensure that electrical short circuits are avoided.
  • the counterelectrode applied to the dielectric layer is covered with an insulating coating, the connections to the signal lines, which are designed as soldered joints, preferably being left out. With this cover, the influence of moisture precipitation is reduced, a silicone resin advantageously being used as a coating.
  • the signal lines are provided with voltage-suppressing switching elements.
  • these are advantageously designed as tens or avalanche diodes or as varistors, which are preferably soldered onto the side of the base plate facing away from the capacitors between the contact strip on the edge thereof and the contact strip for carrying out the signal line.
  • This design ensures that the planar filter used absorbs voltage peaks and thus protects the downstream electronics. Using such components, voltage peaks can be limited in such a way that damage beyond a mere malfunction occurs, for example, in the input of a corresponding computer or avoided in the printer input.
  • At least some of the signal lines at least on one of the sides of the planar filter arranged in the filter receptacle, preferably on both sides with an attenuator increasing the longitudinal inductance in the form of a ferrite bead or the like. are provided to form an L or T filter arrangement. It is advantageous here as an attenuator increasing the longitudinal inductance, which is provided from a ferromagnetic material, preferably made of ferromagnetic ceramic, and a pin receptacle.
  • beads or hollow cores made of a ferromagnetic ceramic increase the longitudinal inductance of the signal line in question, so that the filtering effect of the transverse capacitance increases by forming appropriate L or T filter arrangements and Limit frequency or the limit frequencies is / are shifted into the desired range and possibly to lower values.
  • the housing is formed by a first and a second shell, the plug connections for the signal lines in one of the shells being designed as plug pins, in the other as plug sockets or as plug pins in such a way that the plug connector can be used as an intermediate plug.
  • Signal lines from the plug pins / sockets of the connector part inserted into the first shell of the housing are connected to those of the second connector part.
  • the design as an adapter also allows electronic components to be provided as adaptation elements in at least some connections between the signal lines of the first shell of the housing and the signal lines of the second shell of the housing.
  • a planar filter is arranged in each of the two shells of the housing, and at least some of the signal lines between these planar filters are provided with additional ferromagnetic attenuators which are pushed onto the signal lines in the form of hollow cores or beads, which increase their longitudinal inductance and arranged between the transverse capacitors, form a pi filter effective for the signal line thus connected.
  • FIG. 1 shows in the form of an exploded view the structure of a multi-pin connector 1 with sockets 6 and a multi-pin connector 2 with pins 7.
  • Both connectors 1 and 2 are provided with a metallic housing 4, which is formed in two shells and receives the inside of the connector from both sides, and via which the ground connection can be made.
  • the housing 4 has a protruding collar 4.1, which receives the socket strip 6 with the sockets 6.1 or the plug pins 7.1 and forms their shielding, which receives its ground connection via the connector to be connected.
  • the rear sides of the sockets 6.1 are provided with the connecting pins 6.2 and those of the plug pins 7.1 with the connecting pins 7.2, which protrude from the housing 4 of the assembled connector and can be soldered onto a plug-in card or a circuit board, for example, as soldering pins.
  • a filter carrier 9 is inserted, which receives the filter 10, the filter carrier 9 being provided with contact tongues 9.1, which on the metallization 14.1 or at least one of the outer, metallized edges 11.1 of the base plate 11 of the plate-shaped planar filter 10 16.1 of the common electrode 14 or 16 (FIG. 8) so that they establish an electrical connection with the filter carrier 9.
  • the filter carrier 9, in turn, is inserted into the metallic housing 4 in a conductive manner, the housing edge having a corresponding shape or corresponding contact tongues which achieve reliable contacting by clamping.
  • FIG. 2 shows a connector 1 provided with sockets 6.1 in detail.
  • the structure with the two shells of the housing 4 can be seen, with their collars 4.1 facing outwards.
  • the receptacles 6.1 receiving the shape of the associated shell of the housing 4 adapted socket strip 6 and the pin 6.2 receiving the pin receptacle 8.1.
  • the filter holder 9 with the filter (not shown) is arranged so that each of the connecting lines from one of the socket 6.1 to the associated pin 6.2 is passed through the filter, for which purpose the planar filter 10 for each of these lines 12.1 Breakthrough 12 (see figure 7).
  • This pin receptacle 8.1 at the same time forms a support securing the planar filter 10 inserted in the filter holder 9, which is made of a non-conductive plastic or rubber with a Shore hardness of approximately 40 ° to 60 °, protects the planar filter from shocks and vibrations and gives it a " Work "allowed in case of expansion in the housing due to temperature changes.
  • the section according to FIG. 2c shows the filter receptacle 9 inserted between the shells of the housing 4.
  • the view according to FIG. 2b shows the compactness of the multi-pole connector thus provided with a filter.
  • FIG. 3 shows the same conditions for a multipole plug connector 2, in which plug pins 7.1 are provided as plug elements instead of the plug sockets 6.1 (FIG. 2).
  • a connector pin strip 7 is provided, which replaces the socket strip 6.
  • the sectional view of Figure 3c shows the pins angled by 90 °, for soldering onto a circuit board.
  • the view according to FIG. 3b shows the compactness of the multi-pole connector.
  • FIG. 4 shows an embodiment of the multi-pole plug connector as an intermediate plug 3.1, in the two-shell housing 4 of which the filter carrier 9 with the planar filter 10, which is connected to at least one shell of the housing 4, is arranged.
  • the signal lines that connect the sockets 6.1 and pins 7.1 to one another are led through the pin receptacle 8.1, which, when made from an aluminum oxide ceramic, forms an excellent insulator with a predeterminable dielectric constant.
  • this pin receptacle 8.1 consists of a ferromagnetic material that forms a longitudinal inductance for the signal lines.
  • each of the signal lines is provided with an inductance connected upstream or downstream of the capacitor, so that L-filter arrangements are formed in this way.
  • FIG. 5 shows a multipole connector designed as an adapter 3, in which - in contrast to the intermediate connectors 3.1 according to FIG. 4 - different connector configurations on both sides of the connector and / or different line connections within the adapter 3 are also possible.
  • the structure is shown in the exploded view according to FIG. 5a.
  • the adapter intermediate piece 5 here connects the two shells of the housing 4 and also establishes the through-connection of the ground connections guided over the metallic housing shells; at least its outside is metallized. With this metallization, shielding is also achieved in addition to the plated-through hole, which effectively prevents the radiation of interference signals.
  • the internal connections are in this adapter spacer 5 and can be performed here according to the requirements; For example, a transition from 2-row connectors to 3-row connectors is possible, as is changing the connection scheme, for example for cables to connect incompatible interfaces.
  • the adapter intermediate housing 5 also allows the use of two filter carriers 9 with their possibly different planar filters 10, as can be seen from the exploded view according to FIG. 5a and the sectional view according to FIG. 5c.
  • the view according to FIG. 5b again shows that the filters can be used to achieve an extremely compact design of the multipole connector.
  • FIG. 6 shows an illustration of a with a conductive frame 8.2 filter carrier 9 inserted into the metallic housing 4.1 with the planar filter 10.
  • This conductive frame 8.2 here makes contact with the housing 4.1 lying at ground potential and thus ensures a good earth connection, which also with dimensional deviations or (small) deformations due to the elasticity of the plastic or rubber with a Shore hardness of 40 ° to 60 ° of the frame 8.2 is retained.
  • this frame 6.2 is squeezed as a result of the compression, so that the resiliently resilient plastic or the rubber lies flat all around and ensures good contact, even when there is deformation when handling the connector.
  • Figure 7 shows a highly schematic exploded view of the structure of the planar filter.
  • a metal electrode layer is applied as a base electrode 14 to a base plate 11 made of a ceramic, in particular based on aluminum oxide, which surrounds the base plate 11 with angled strips 14.1 and is in electrical contact with the advantageously likewise metallized outer sides 11.1 of the base plate 11, possibly by soldering.
  • the next layer 15 is formed by the dielectric, which is constructed in particular on a titanate basis.
  • the counterelectrodes 16 necessary for the formation of the capacitors are provided, which are shown in the selected representation as individual electrodes.
  • This essentially flat structure is covered by an insulating protective coating 17, a plastic or a lacquer, so that the planar filter is protected from external influences, such as, for example, from air humidity or corrosive gases.
  • All layers have aligned, hole-shaped recesses 12 for the passage of the signal lines 12.1 (FIG. 8); these bushings (not shown in more detail in FIG. 7) are shown in FIG Cases dashed, with the reference numeral 12 clarified, all bushings through the metallic base electrode 14, which forms the common (ground) electrode in the illustrated embodiment, are marked with a cross.
  • FIG. 7a shows a different embodiment of the base electrode 14 corresponding to the illustration in FIG. 7, in which the cross-sectional shapes of the further openings 14.2 are different.
  • the ceramic of the dielectric layer 15 is firmly connected, quasi anchored, to the ceramic of the base plate 11 through the recesses provided in the holes 14.2.
  • This anchoring is of crucial importance for the load-bearing capacity of the connection, in particular due to stresses resulting from different coefficients of thermal expansion.
  • the individual bushings 12 for the signal lines 12.1 are such that the base plate 11 lies (relatively) closely on the signal line 12.1.
  • the metallization of the base electrodes 14 is drawn into the feedthrough 12 so that the electrical connection to the base electrode 14 can be made by simple soldering. This is irrespective of whether the base electrode 14 is designed as a common (ground) electrode (as shown in FIG. 8a) or whether the base electrode 14 disintegrates into individual electrodes, each of which is connected to the assigned signal line 12.1 (as shown in Figure 8b).
  • the dielectric layer 15 is recessed in the area of the bushings 12, so that there are recesses around the bushings 12, in the bottom of which there is the solder joint 12.2, which creates the connection from the corresponding signal line 12.1 to the single electrode.
  • the free top of the dielectric layer 15 carries the counter electrode 16, which in turn is covered by the protective coating 17.
  • planar filter 10 or 10 'thus constructed is inserted into a metallic filter holder 10.1, which is in an electrically conductive connection with the contact strips 14.1 or 16.1 at the preferably metallized edges 11.1 of the base plate 11 and which in turn is in the filter carrier 9 (FIG. 1 to 5) is used.
  • the base electrode 14 is shown as a continuous, common electrode, which on both longitudinal sides into both outer edges 11.1 of the base plate 11, which are preferably provided with a metal support, result in the contact strips 14.1 with which the ground connection via the filter carrier 9 and the like Housing 4 of the connector according to Figures 1 to 5 is made.
  • the counterelectrode 16 is designed here as a single electrode, which surrounds each of the bushings 12 for the signal lines 12.1 in an island-like manner, so that an electrode is available for each of the signal lines 12.1, which extends over the edge of the cup-like depression in the dielectric layer 15 surrounding the bushing 12 runs and thus reaches the bottom of each of the bushings 12 and can be connected to the signal line 12.1 by means of the solder joint 12.2.
  • FIG. 8b shows the reversal:
  • the counter electrode forms the continuous, common electrode which, on the two long sides, extends to the edges 11.1 of the base plate 11, which forms the contact strips 16.1 which make ground contact.
  • the base electrode 14 is broken down into individual electrodes and is introduced into each of the recesses in the base plate as a contact strip 14.1 for soldering to the associated signal line 12.1, the individual electrodes of the base electrode 14 surrounding the signal line bushings in an island-like manner here.
  • Figure 9 shows an embodiment in which some or all of the signal lines 12.1, the sockets 6.1 and 7.1 (or sockets-sockets or pins-pins) of an intermediate connector or pins 7.1 and pins 7.2 (or sockets-pins) of a solderable connector connect, by means of a surge suppressor 19, for example soldered on using SMD technology in the form of tens or avalanche diodes, are particularly protected against voltage peaks.
  • a surge suppressor 19 for example soldered on using SMD technology in the form of tens or avalanche diodes
  • the damping bead is advantageously designed such that it is received by the cup-like depression in the dielectric layer 15 and embedded in the protective coating 17. This arrangement is shown enlarged in FIG. 9a, a ferrromagnetic pearl 18 being pushed onto the signal line 12.1 for additional longitudinal damping.

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EP91119122A 1991-06-14 1991-11-11 Connecteur électrique multipolaire pour lignes de signaux électroniques Expired - Lifetime EP0517952B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002071122A CA2071122C (fr) 1991-06-14 1992-06-12 Connecteur multipolaire pour lignes de transmission de signaux electriques
JP15526892A JPH06181080A (ja) 1991-06-14 1992-06-15 電気信号線路のための多極プラグコネクタ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9107385U 1991-06-14
DE9107385U DE9107385U1 (de) 1991-06-14 1991-06-14 Mehrpoliger Steckverbinder für elektronische Signalleitungen

Publications (3)

Publication Number Publication Date
EP0517952A2 true EP0517952A2 (fr) 1992-12-16
EP0517952A3 EP0517952A3 (en) 1993-08-11
EP0517952B1 EP0517952B1 (fr) 1995-06-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91119122A Expired - Lifetime EP0517952B1 (fr) 1991-06-14 1991-11-11 Connecteur électrique multipolaire pour lignes de signaux électroniques

Country Status (4)

Country Link
US (1) US5242318A (fr)
EP (1) EP0517952B1 (fr)
DE (2) DE9107385U1 (fr)
ES (1) ES2075305T3 (fr)

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US4791391A (en) * 1983-03-30 1988-12-13 E. I. Du Pont De Nemours And Company Planar filter connector having thick film capacitors
BR8401396A (pt) * 1983-03-30 1984-11-06 Du Pont Conector eletrico para filtrar ampla faixa de frequencias
CH667960A5 (de) * 1985-02-08 1988-11-15 Bbc Brown Boveri & Cie Vorrichtung zum schutz elektrischer schaltungen.
US4729752A (en) * 1985-07-26 1988-03-08 Amp Incorporated Transient suppression device
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NL8701661A (nl) * 1987-07-14 1989-02-01 Du Pont Nederland Filtereenheid voor connectoren.
NL8800609A (nl) * 1988-03-11 1989-10-02 Du Pont Nederland Connector.
DE8805669U1 (de) * 1988-04-29 1988-08-25 Jermyn GmbH, 6250 Limburg Vorrichtung zur Herstellung von elektrischen Verbindungen zwischen zu programmierenden elektronischen Bauteilen und dem elektronischen Programmiergerät
GB8907141D0 (en) * 1989-03-30 1989-05-10 Oxley Dev Co Ltd Electrical connectors
US4950185A (en) * 1989-05-18 1990-08-21 Amphenol Corporation Stress isolated planar filter design

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19815488C1 (de) * 1998-04-07 2000-03-09 Itt Mfg Enterprises Inc Elektrischer Steckverbinder

Also Published As

Publication number Publication date
US5242318A (en) 1993-09-07
EP0517952B1 (fr) 1995-06-14
EP0517952A3 (en) 1993-08-11
DE9107385U1 (de) 1992-07-16
ES2075305T3 (es) 1995-10-01
DE59105732D1 (de) 1995-07-20

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