Abstract:
A circuit board including a capacitor structure formed on a surface of an insulating substrate, wherein the capacitor structure includes paired linear conductive layers arranged on the surface of the insulating substrate, parallel to each other with a predetermined distance between them, and a dielectric material filled in a groove defined by those surfaces of the paired linear conductive layers which face each other and the surface of the insulating substrate.
Abstract:
A printed wiring board having differential pair signal traces has increased spacing between signal-carrying vias and ground or power planes and/or is equipped with selectively placed ground vias to enhance the impedance matching of the signal traces.
Abstract:
A insulation displacement connector (IDC) patch panel includes a circuit (PC) board with interdigitated capacitance for balancing out inherent capacitance found within IDCs of the panel and conventional plug connectors coupled to the panel. Unwanted cross-talk signals are reduced as a consequence.
Abstract:
A compact electromagnetic coupler for use with digital transmission system is described. In one embodiment, the apparatus includes a first transmission structure, including a portion having a geometry. A second transmission structure having the geometry and positioned proximate the portion of the first transmission line structure having the geometry to form a compact electromagnetic coupler with the first transmission structure a geometry of the electromagnetic coupler to enable placement within a footprint of a standard card connector. The compact electromagnetic coupler so formed enables reconstruction of the logical state and timing of a signal transmitted along the first transmission structure.
Abstract:
A center-tap termination circuit which includes two resistors having the same resistance, which are serially connected between forward and return transmission lines, where the forward and return transmission lines constitute a differential signal transmission line. A capacitor is connected between a connector that interconnects the two resistors and a GND of 6 a printed circuit board. The forward and return transmission lines are substantially equidistant from each other along their lengths. The resistors and the capacitor are arranged outside the forward and return transmission lines. The connector is provided intersecting, in three-dimensional space, the forward and return transmission lines, such as being formed by a jumper bridging the two lines, or by being formed on a different layer of a multilayer printed circuit board. Variations in the differential impedance are suppressed, and the transmission return/transmission forward characteristics of differential signals are substantially matched. The differential impedance matching is achieved, and high-quality signal waveforms are maintained. Not only noise emitted due to differential mode current components, but also noise emitted due to common mode current components are suppressed.
Abstract:
In a two-dimensional layout, the bus signal lines are arranged such that adjacent signal lines are of different buses. The different buses transmit signals changed at different timings. The signal lines of the same buses transmit signals changed substantially at the same timing. Thus, cross-talk noise between signal lines can be reduced without widening a bus line pitch.
Abstract:
The present invention relates to an interposer substrate for interconnecting between active electronic componentry such as but not limited to a single or multiple integrated circuit chips in either a single or a combination and elements that could comprise of a mounting substrate, substrate module, a printed circuit board, integrated circuit chips or other substrates containing conductive energy pathways that service an energy utilizing load and leading to and from an energy source. The interposer will also possess a multi-layer, universal multi-functional, common conductive shield structure with conductive pathways for energy and EMI conditioning and protection that also comprise a commonly shared and centrally positioned conductive pathway or electrode of the structure that can simultaneously shield and allow smooth energy interaction between grouped and energized conductive pathway electrodes containing a circuit architecture for energy conditioning as it relates to integrated circuit device packaging. The invention can be employed between an active electronic component and a multilayer circuit card. A method for making the interposer is not presented and can be varied to the individual or proprietary construction methodologies that exist or will be developed.
Abstract:
A discontinuity, such as a via, in a signal transmission line can introduce a parasitic element that affects the signal transmission. The method in accordance with embodiments of the present invention are directed to counteracting the transmission line parasitic element discontinuity. The method includes determining the amount of parasitic capacitance or inductance that is introduced at a portion of the transmission line, such as by the via. A suitable amount of delay is introduced to the transmission line by way of correction impedance in order to counteract the affects of the parasitic element. The delay is calculated taking into account at least in part the correction impedance and the parasitic element effect. The correction impedance is suitably added to a portion of the transmission line at which the parasitic element is present.
Abstract:
Termination assemblies for terminating high-frequency data signal transmission lines include housings with one or more cavities that receive ends of the transmission line therein. The transmission line typically includes a dielectric body and a plurality of conductive elements disposed thereon, with the plurality of conductive elements being arranged in pairs for differential signal transmission. The termination assemblies, in one embodiment include hollow end caps that are formed from a dielectric and which have one or more conductive contacts or plated surfaces disposed on or within the cavity so that they will frictionally mate with the conductive traces on the transmission line. In another embodiment, a connector housing is provided with a center slot and a plurality of dual loop contacts to provide redundant circuit paths and low inductance to the termination assembly. A coupling element may be utilized in the slot to achieve a desired level of coupling between the termination contacts.
Abstract:
Termination assemblies for terminating high-frequency data signal transmission lines include housings with one or more cavities that receive ends of the transmission line therein. The transmission line typically includes a dielectric body and a plurality of conductive elements disposed thereon, with the plurality of conductive elements being arranged in pairs for differential signal transmission. The termination assemblies, in one embodiment include hollow end caps that are formed from a dielectric and which have one or more conductive contacts or plated surfaces disposed on or within the cavity so that they will frictionally mate with the conductive traces on the transmission line. In another embodiment, a connector housing is provided with a center slot and a plurality of dual loop contacts to provide redundant circuit paths and low inductance to the termination assembly. A coupling element may be utilized in the slot to achieve a desired level of coupling between the termination contacts.