Abstract:
This printed circuit board (12) comprising: a first portion (20) having first electronic components (22) of which the earth electrode is on a first voltage source (14); a second portion (24) having second electronic components (26) of which the earth electrode is on a second voltage source (16); a switched-mode power supply circuit (34) of which one input is connected to the first portion (20) and of which at least one output is connected to the second portion (24), is characterized in that it comprises modification means (36) for modifying a switching frequency of the switched-mode power supply circuit (34) depending on data values (32) to be transmitted between the first portion (20) and the second portion (24), the said data being able to take at least two distinct values.
Abstract:
An egress lighting system which utilizes an efficient primary and emergency light source and complies with the NEC standards for emergency egress lighting. This invention combines two sets of LEDs onto a single circuit board to provide primary lighting and secondary emergency egress lighting while keeping the circuits of the primary and secondary lighting electrically separate or isolated.
Abstract:
The present invention relates to the field of integrating electronic systems that operate at mm-wave and THz frequencies. A monolithic multichip package, a carrier structure for such a package as well as manufacturing methods for manufacturing such a package and such a carrier structure are proposed to obtain a package that fully shields different functions of the mm-wave/THz system. The package is poured into place by polymerizing photo sensitive monomers. It gradually grows around and above the MMICs (Monolithically Microwave Integrated Circuit) making connection to the MMICs but recessing the high frequency areas of the chip. The proposed approach leads to functional blocks that are electromagnetically completely shielded. These units can be combined and cascaded according to system needs.
Abstract:
A printed circuit board having a generally box-like carrier plate with a top side and an underside. The board has at least first and second conductor track plane separated by a first distance and an electrical circuit which occupies at least one section of the carrier plate. The section contains a screen for protecting the circuit from electromagnetic interference. The screen has a first screening conductor track which is arranged on the first conductor track plane and surrounds the section, and a second screening conductor track which is arranged on the second conductor track plane and also surrounds the section. The first and second screening conductor tracks are congruent at least in a circumferential region which surrounds the circuit. The screen has, in the circumferential region, a plurality of plated-through holes which penetrate the carrier plate and connect the first and second screening conductor tracks.
Abstract:
To minimize the warpage of an organic substrate that supports at least one electrical hardware component (e.g., a system-in-package module), a bottom surface of a lid is attached to a top surface of the electrical hardware component. The lid includes a leg that extends from the bottom surface of the lid towards a top surface of the substrate. A portion of the leg closest to the substrate may move relative to the substrate. As the lid warps, the lid does not also cause distortion of the substrate. The leg may be a flange that extends at least a portion of the width or at least a portion of the length of the lid, may be a post located at the perimeter of the lid, or may be any other portion extending from above the electrical component towards the substrate.
Abstract:
There is provided an electronic device having an audio system for reproducing audio signals. An exemplary electronic device has an analog region and a separate and non-overlapping digital region. The electronic device comprises an analog ground plane disposed within the analog region and a digital ground plane disposed within the digital region. Digital circuitry is disposed opposite the digital ground plane, wherein digital signals are routed on or over the digital ground plane. Analog circuitry is disposed opposite the analog ground plane, wherein analog signals are routed on or over the analog ground plane. At least one audio output channel disposed opposite the analog ground plane.
Abstract:
In a circuit module, a conductive partition is defined by a plurality of conductive chips provided on a component mounting surface. The component mounting surface is divided into a first block and a second block by the conductive partition. The shape of the conductive partition can be freely changed in accordance with the size of a circuit board and the arrangement of electronic components in the first block and the second block by changing the positions of the conductive chips and the number of conductive chips. Electromagnetic interference between the first block and the second block is prevented by the conductive partition.
Abstract:
A circuit board is provided with a plurality of MOSFETs (metal oxide semiconductor field effect transistors) each of which include a field effect transistor and an associated control circuit. The control circuits are mounted in a control section of the board remote from a power section mounting the MOSFETs. The present invention reduces the assembly steps required in the prior art wherein the MOSFET and its control circuit were mounted as preassembled units to the board. Moreover, the number of MOSFETs per unit area of board is increased by the present invention.
Abstract:
In a laminated high-frequency module, a laminate includes a plurality of dielectric layers. In a lower layer region including some of the plurality of dielectric layers, a digital circuit is provided. In an interlayer region including some of the plurality of dielectric layers, a digital circuit and an analog circuit are arranged so that they do not overlap in plan view of the laminate. In an upper layer region including some of the plurality of dielectric layers, a digital circuit is provided. Digital ICs are mounted on the surface of the uppermost dielectric layer in the upper layer region. An inner-layer ground electrode is provided on substantially an entire boundary surface between the lower layer region and the interlayer region and on substantially an entire boundary surface between the interlayer region and the upper layer region. In the interlayer region, a digital line and an inner-layer ground electrode are alternately arranged in the lamination direction.
Abstract:
A wiring substrate is provided. The wiring substrate includes: a core layer in which a gap is formed; and a lamination layer which includes an insulating layer and a wiring layer and which is formed on at least one surface of the core layer. The lamination layer has a thermal expansion coefficient different from that of the core layer. A plurality of mounting regions on which an electronic component is to be mounted are provided on the lamination layer to be spaced from each other. The gap in the core layer is filled with an insulating member having the same material as the insulating layer and surrounds each of the plurality of mounting regions or each of mounting region groups including one or more of the mounting regions.