Abstract:
Disclosed is a printed wiring board having signal layers each interposed between a power supply layer and a ground layer, wherein the signal layer includes at least one of a wiring region for a ground potential and a wiring region for a power supply potential.
Abstract:
A delay filter module comprising at least one dielectric boneblack ceramic band pass filter and a circuit for compensating/equalizing the signal delay produced by the delay filter. In one embodiment, the circuit is defined by a hybrid coupler defining at least two ports coupled to a dielectric ceramic reactive termination block defining at least a pair of reactive termination resonators and coupling capacitors. The delay can be adjusted by tuning the dielectric boneblack band pass filter and/or the reactive termination resonators and/or the coupling capacitors defined by the dielectric ceramic reactive termination block.
Abstract:
According to one embodiment, a printed wiring board includes an insulating layer, a first conductor pattern on the insulating layer configured to be a signal line, and a second conductor pattern on the insulating layer. The second conductor pattern includes a larger conductor area than the first conductor pattern, and a slit which allows the second conductor pattern to stretch to follow a thermal expansion of the insulating layer.
Abstract:
A multilayer printed circuit board, including: a signal interconnection which transmits and receives an electrical signal between electronic components; a ground interconnection connected to a ground of a circuit; a power interconnection connected to a power layer to supply power to electronic components; at least one ground layer installed in an inner layer; at least one clearance which passes through the ground layer; and a ground via which connects the ground interconnection with the ground layer. The signal interconnection and the ground interconnection or the signal interconnection and the power interconnection are installed in a pair, and a pair of interconnection vias for interlayer connection are inserted through the clearance installed in the ground layer so that one of the pair of interconnection vias is connected to the ground layer by the ground interconnection.
Abstract:
A printed circuit board (PCB) reduces a simultaneous switching noise (SSN) causing power noise, thereby reducing radiated electromagnetic interference (EMI). In a double-layered PCB, a first substrate is arranged in parallel with a second substrate while being spaced apart from the second substrate by a predetermined distance. The first substrate includes a ground plane, which is deposited over an entirety of the first substrate. The second substrate includes a power plane deposited at a position of a component mounted to the printed circuit board (PCB) to transmit power to the component. Thus, the power trace of the PCB is simplified in structure, thereby reducing EMI radiation noise.
Abstract:
The present invention relates to computer hardware design, and in particular to a printed circuit board (card) comprising wiring dedicated to supply electric board components such as integrated circuits with at least three different reference planes. In particular at locations, where the pins of a card-to-card connector enter the layer structure of the card discontinuities brake the high frequency signal return path of a given signal wiring.In order to close the signal return path around a signal path from card to card including the connector, and thus to limit the signal coupling while concurrently keeping the card design as simple as possible, it is proposed to provide a) an additional capacitance for a given signal wiring in a discontinuity section, b) wherein the additional capacitance is formed by a voltage island placed within a signal layer located next to the given signal wiring.
Abstract:
A printed circuit board (PCB) includes first and second signal layers sandwiching a dielectric layer therebetween and a first differential pair and a second differential pair each having a positive differential trace and a negative differential trace. The positive differential traces of the two differential pairs are disposed within the first signal layer. The negative differential traces of the two differential pairs are disposed within the second signal layer. The positive differential trace of the first differential pair is defined at the left side of the positive differential trace of the second differential pair. The negative differential trace of the first differential pair is defined at the right side of the negative differential trace of the second differential pair.
Abstract:
An exemplary FPCB includes two or more dielectric layers. Each dielectric layer is located between a signal layer and a ground layer. A differential pair including two transmission lines is arranged in each signal layer. Each ground layer includes one or more voids defined therein. Each void is opposite and adjacent to a differential pair.
Abstract:
A mechanism for continuously referencing signals over multiple layers in laminate packages provides a continuous path for signals from one layer to another while using the ideal voltage reference for all areas of the package and still avoiding discontinuities in the voltage reference. A reference plane adjustment engine analyzes a package design and identifies an ideal top plane for all areas of the package, including areas under particular chip die(s) and areas that are not under a chip die. The reference plane adjustment engine then modifies the package design to reposition ground planes, source voltage planes, signal planes, and vias between layers to maintain a continuous voltage reference regardless of the top layer. The reference plane adjustment engine provides the resulting mixed voltage plane package design to a design analysis engine. A package fabrication system fabricates the package.
Abstract:
A printed circuit board with ground grid includes a first insulating plate, a plurality of first metal lines formed on the first insulating plate, a sub-circuit board above the plurality of first metal lines, a second insulating plate above the sub-circuit board, a plurality of second metal lines formed on the second insulating plate, and, a plurality of conductive components formed in and through the second insulating plate and the sub-circuit board to electrically connect the plurality of first metal lines and the plurality of second metal lines. As additional electronic elements and circuits can be located on the first insulating plate and/or on the second insulating plate without limitation, difficulties for printed circuit board layout can be dramatically reduced.