Abstract:
A printed circuit board with improved signal integrity for one or more differential signal pairs incorporates one or more conductive regions. In an exemplary embodiment, via structures for the differential pair that interconnect signal traces are isolated from the conductive region by an antipad area around the via structures and a conductive bridge. In alternate embodiment, an antipad area around the via structures includes a bridge between the via structures. The antipad area may comprise, by way of non-limiting example, a clipped circular aperture or a modified rectangular aperture. The bridge may, by non-limiting examples, comprise a portion of the conductive region to permit impedance tailoring of the differential pair with respect to the conductive region.
Abstract:
The present disclosure is directed to systems and methods for a multiport connector assembly, used in telecommunication systems, that is designed to reduce electrical port to port crosstalk noise. The assembly is adapted to reduce noise from adjacent ports by placing balancing isolators and capacitor radiators in noise reducing regions of a printed circuit board. The signals are radiated in properly selected areas to rebalance the noise generated from adjacent transmission ports. By rebalancing noise inherently coupled by adjacency of transmitters, the port to port near-end crosstalk and far-end crosstalk noise is substantially reduced.
Abstract:
An array of electrostatic discharge (ESD) devices conforms to the pitch defined by balanced signal lines on a printed wiring board (PWB) so that the array does not unduly affect the design impedance of the balanced lines.
Abstract:
An apparatus that includes a first conducting strip having a narrowed width where the first conducting strip also acts as a first electrode for a first tapping capacitance. The first tapping capacitance has a second electrode that is: 1) parallel to the first conducting strip; and 2) closer to the first conducting strip than a second conducting strip. The second conducting strip is parallel to the first conducting strip and has a narrowed width where the second conducting strip also acts as a first electrode for a second tapping capacitance. The second tapping capacitance has a second electrode that is: 1) parallel to the second conducting strip; and 2) closer to the second conducting strip than the first conducting strip.
Abstract:
A method (and structure) of making an electronic interconnection, includes, for a signal line to be interconnected, using a plurality of bonding wires configured to provide a controlled impedance effect.
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:
Methods for designing SMT connector footprints are disclosed. A circuit board may have disposed thereon an arrangement of SMT pads and corresponding vias. The arrangement of vias may differ from the arrangement of SMT pads. The arrangement of SMT pads may differ from the arrangement of contacts in a connector the footprint is designed to receive. The terminal ends of the contacts may be jogged or bent for electrical connection with the SMT pads. The SMT pads and vias may be arranged in a number of ways that increase signal contact density of the board, while limiting cross-talk and providing adequate impedance and routing space on the board. An interactive tool for designing such a footprint is disclosed.
Abstract:
A printed circuit board includes a signal layer, a pair of signal lines, and a plurality of conductive pads arranged on the signal layer. The conductive pads are located between the two signal lines for reducing crosstalk.
Abstract:
The embodiments of the present invention relate to an improved printed circuit board having additional rows of ground vias to reduce crosstalk in the board. A printed circuit board according to one embodiment of the present invention comprises a first row of vias and a second row of vias, each having a plurality of signal vias. The circuit board also comprises a plurality of rows of vias being coupled to a ground plane between the first row of signal vias and the second row of signal vias. According to one embodiment, the plurality of rows of vias being coupled to a ground plane comprise rows of vias having different sizes. Some of the vias are designed to receive a component, while others are generally smaller and designed to provide a return current path for the signal vias.