Devices, systems, and methods for serial communication over a galvanically isolated channel are disclosed. A device includes a first IC device interface, first IO components connected to the first IC device interface, a second IC device interface, second IO components connected to the second IC device interface, an insulator layer having a first major surface and a second major surface, at least one pair of capacitor plates and corresponding interconnection paths on the first major surface, and at least one pair of capacitor plates and corresponding interconnection paths on the second major surface, wherein the at least one pair of capacitor plates on the first major surface of the insulator layer are aligned with the at least one pair of capacitor plates on the second major surface of the insulator layer to form at least one pair of capacitors.

A printed circuit board of an information handling system includes a dielectric layer, adjacent differential pairs, a ground layer, and a ground wall. The adjacent differential pairs are plated on the dielectric layer, and generate crosstalk between each other. The ground wall is in physical communication with and electrically coupled to the ground layer. The ground wall extends substantially perpendicular from the ground layer through the dielectric layer. A top surface of the ground wall is a specific height above a top surface of the adjacent different pairs. The ground wall suppresses the generated crosstalk based on the specific height and a width of the ground wall.

The insertion loss of a multilayer substrate and an antenna element is reduced. A multilayer substrate according to an embodiment of the present disclosure includes a multilayer body, a wire conductor, and a first ground electrode. The multilayer body is formed by dielectric layers being layered. The wire conductor is formed in the multilayer body, and a radio frequency signal passes through the wire conductor. The first ground electrode is formed in or on the multilayer body and includes a first surface that faces the wire conductor. The first surface includes a first region and a second region. The surface roughness of the first region is lower than the surface roughness of the second region. The first region overlaps at least part of the wire conductor in plan view in a direction normal to the first ground electrode.

A wiring board according to the present disclosure includes a core layer including core electrical conductor layers on upper and lower surfaces of a core insulating layer, a first build-up portion, a second build-up portion, a first mounting region, and a second mounting region. The first build-up portion includes a first build-up insulating layer and a first build-up electrical conductor layer connected to the first mounting region. The second build-up portion includes a second build-up insulating layer and a second build-up electrical conductor layer connected to the second mounting region. The second build-up insulating layer includes a margin for adhesion between the second build-up insulating layers or between the second build-up insulating layer and the core insulating layer. The second build-up electrical conductor layer includes an electrical conductor layer for grounding, a first opening, and a signal pad located inside the first opening.

The present disclosure provides circuit structure configured to decrease a phase difference between a first signal and a second signal. The circuit structure includes substrate. The substrate includes a first conductive layer, a first woven dielectric layer, and a second woven dielectric layer. The first conductive layer is disposed over the substrate. The first conductive layer includes a circuit pattern configured to transmit the first signal and the second signal. The first woven dielectric layer is stacked below the first conductive layer. The first woven dielectric layer has a plurality of first opens. The second woven dielectric layer is stacked below the first woven dielectric layer. The second woven dielectric layer has a plurality of second opens. The plurality of first opens and the plurality of second opens are misaligned from a top view.

The present application discloses a differential signal routing line of a circuit board and a circuit board, which comprises a circuit board, and the circuit board is provided with differential signal routing lines including a first differential signal routing line and a second differential signal routing line that are disposed at different layers of the circuit board.

A PCB bridge for interconnection of two or more semiconductor chips for data communication between the semiconductor chips includes a plurality of metal strips; and a dielectric material disposed in between the plurality of metal strips. The PCB bridge is employed in a vertical direction in a semiconductor module for interconnection of two or more semiconductor chips, the vertical direction of the PCB bridge provides a flexible impedance matching by adjusting the dielectric material and a trace width of the PCB bridge, and the vertical direction of the PCB bridge avoids signal reflections by matching the impedance to a source, and a trace length of the PCB bridge is limited by spacing in between two semiconductor chips which further limited inductance of the trace of the PCB bridge.

Disclosed is an optical receiver. The optical receiver includes a circuit board, a base member, a photodetector mounted on the base member, a transimpedance amplifier, and a capacitor. The base member is disposed between a first grounding pattern and a second grounding pattern on a first side of the circuit board. The transimpedance amplifier is mounted on the first grounding pattern. The capacitor is mounted on the second grounding pattern. The first wiring pattern and the second wiring pattern are apart from both the first grounding pattern and the second grounding pattern in a plan view of the first side. The first grounding pattern is electrically connected to the second grounding pattern through a grounding pattern formed on the first side.

A signal transmission circuit includes a printed circuit board including a surface layer including a signal transmission path that transmits a signal, a signal line through hole that connects the signal transmission path with a signal layer arranged in an inner layer of the printed circuit board, a ground layer of the inner layer of the printed circuit board that forms a return current transmission path for the signal transmission path, and a ground through hole that is connected to the ground layer adjacent to the signal line through hole. A ground pattern including ground areas disposed with a certain distance therebetween and a side ground area connected with at least one end side of the ground areas is disposed at positions of both sides of the signal transmission path. The ground through hole is disposed to connect the ground pattern with the ground layer.

A printed board includes a first and second insulator extending in a first direction; a third insulator extending in a second direction and including a first and second portion located above and below the first insulator respectively in a third direction; a fourth insulator extending in the second direction, and including a third and fourth portion located below and above the first insulator respectively in the third direction; and a first and second conductor extending in the first direction, and arranged along the second direction with a first pitch therebetween. The first pitch is an n multiple of a first distance that is based on an interval between the first and second portion or the third and fourth portion. The n is an integer equal to or greater than 1.