Abstract:
A mounting or connecting recognition circuit is built onto a printed circuit board, this mounting or connecting recognition circuit having a component to be checked for, a mounting or connecting recognition pad that recognizes whether or not the component is mounted, a mounting or connecting recognition signal being output when the component is mounted at the mounting or connecting recognition pad, and a mounting or connecting recognition circuit which recognizes that the component is mounted by means of the mounting or connecting recognition signal. When the component to be checked for is mounted at the mounting or connecting recognition pad, the mounting or connecting recognition circuit recognizes that it is mounted by means of detecting the potential level of the signal output from the mounting or connecting recognition pad.
Abstract:
In a multi-layered printed circuit board on which an LSI having a plurality of power supply pins and a plurality of signal pins is mounted, and a grid array package which adopts the printed circuit board, some or all of the plurality of power supply pins are connected to a power supply pattern via an inductance pattern, thereby reducing generation of radiation noise.
Abstract:
An electrical connection system, for example a drop-side patch panel, comprises a mounting rail (12) which receives first connectors (14) arranged with their contacts facing away from the rail (12). Cable introduced between the rail and the connectors is separated into individual conductors which are terminated at contacts (34, 36) via slots (30) in the rail walls. A second connector (16) carries standard data or voice sockets communications (19) which are connected to the first connector via edge contact carrying PCBs (38) which engage in slots (40) in the first connectors. The PCB edge connectors have a discontinuity on one surface, and one half of the contact is connected to the contact on the other side to enable direct connection between upper (34) and lower (36) rows of contacts of the first connectors in a first position of the second connectors, and contact between the upper rows of contacts and the standard sockets (19) in a second position.
Abstract:
An electrical connection system, for example a drop-side patch panel, comprises a mounting rail (12) which receives first connectors (14) arranged with their contacts facing away from the rail (12). Cable introduced between the rail and the connectors is separated into individual conductors which are terminated at contacts (34, 36) via slots (30) in the rail walls. A second connector 16 carries standard data or voice sockets communications (19) which are connected to the first connector via edge contact carrying PCBs (38) which engage in slots (40) in the first connectors. The PCB edge connectors have a discontinuity on one surface, and one half of the contact is connected to the contact on the other side to enable direct connection between upper (34) and lower (36) rows of contacts of the first connectors in a first position of the second connectors, and contact between the upper rows of contacts and the standard sockets (19) in a second position.
Abstract:
An insulation displacement contact comprises first and second contact portions each of which comprises a cantilevered split beam. The upper split beam, which receives insulated wires, comprises a pair of tynes which are folded about the axis of a slot separating the tynes such that the internal angle between the tynes is approximately 90°. The width of the tynes is larger than that of prior art devices resulting in increased stiffness and the length of the tynes is sufficiently long to receive two wires therebetween. The contacts are mounted in a housing which includes a plurality of teeth provided with means for retaining lugs on the end of the tynes to ensure bowed opening of the tynes on insertion of a wire. The contacts are arranged along the central axis of the housing such that the folded tynes of alternate contacts extend on opposite sides of the central axis.
Abstract:
An insulation displacement contact (10) comprises first and second contact portions each of which comprises a cantilevered split beam (19). The upper split beam, which receives insulated wires, comprises a pair of tynes (20,22) which are folded about the axis of a slot (25) separating the tynes such that the internal angle between the tynes is approximately 90°. The width of the tynes is larger than that of prior art devices resulting in increased stiffness and the length of the tynes is sufficiently long to receive two wires therebetween. The contacts (10) are mounted in a housing which includes a plurality of teeth (90) provided with means for retaining lugs (32,34) on the end of the tynes to ensure bowed opening of the tynes on insertion of a wire. The contacts are arranged along the central axis (72) of the housing such that the folded tynes of alternate contacts extend on opposite sides of the central axis.
Abstract:
Contact autodénudant comprenant une première et une deuxième partie de contact, dont chacune comporte un profilé en porte-à-faux divisé. Le profilé divisé supérieur recevant les fils isolés comprend une paire de dents pliées autour de l'axe d'une fente séparant lesdites dents de telle sorte que l'angle interne entre celles-ci soit d'environ 90°. La largeur des dents est plus importante que celle qui caractérise les dispositifs de la technqiue antérieure, ce qui entraîne une rigidité accrue et leur longueur est suffisamment importante pour placer deux fils entre elles. Les contacts sont montés dans un boîtier qui comprend plusieurs dents munies d'un moyen destiné à retenir des têtons à l'extrémité des dents de façon à permettre l'ouverture courbée des dents lors de l'indroduction d'un fil. Les fils sont disposés le long de l'axe central du boîtier de telle sorte que les dents pliées de contacts alternés s'étendant sur les côtés opposés de l'axe central.
Abstract:
Electromagnetic filtering for a VLSI device having multiple power input leads is realized by employing a sub-power plane which is physically separate from a main power distribution system on a circuit board. The sub-power plane is placed directly under a corresponding VLSI device. Decoupling capacitors are connected to the sub-power plane and, in turn, to each of the power input leads on the VLSI device. Power is supplied from the main power distribution system to the sub-power plane via a ferrite bead type filter.