Abstract:
A printed wiring board including: a first VIA for allowing a second wiring to penetrate the printed wiring board from a front surface to a rear surface of the board; a second VIA for allowing the second wiring to penetrate the board from the rear surface to the front surface; an alignment interval where the first and second wirings are arranged on the front and rear surfaces of the board, respectively, and the first and second wiring are substantially parallel to each other in plan view; a first interval provided between the first VIA and the alignment interval; and a second interval provided between the alignment interval and the second VIA, in each of first and second intervals, the first wiring is formed crookedly such that the first wiring and the second wiring have substantially the same length.
Abstract:
A communications jack assembly includes: a jack frame having a plug aperture; a dielectric mounting substrate attached to the jack frame; and a plurality of conductors engaged with the mounting substrate, each of the conductors including a fixed end portion mounted with the mounting substrate and a free end portion extending into the plug aperture for electrical contact with a mating plug, each of the free end portions having substantially the same profile and being substantially transversely aligned in side-by-side relationship. A first pair of conductors is sandwiched inside a second pair of conductors. The second pair of conductors includes a crossover, the positioning of crossover being selected to provide differential to common mode crosstalk compensation.
Abstract:
A symmetrical circuit layout structure includes a number of signal wires, a ground wire and a dielectric layer. The signal wires include a first portion placed on a first plane and a second portion placed on a second plane. The ground wire includes a first portion placed above the first portion of the signal wires and adjacent to the second portion of the signal wires, and a second portion placed below the second portion of the signal wires and adjacent to the first portion of the signal wires. The dielectric layer is placed between the first plane and the second plane.
Abstract:
A flexible printed circuit film has a first wiring and a second wiring. The first wiring is formed on a layer other than where the second wiring is formed, and crosses the second wiring almost at right angle 90°. This structure of the flexible printed circuit film enables to make electronic devices lighter, smaller, and denser than the conventional one. This structure of the flexible printed circuit film also reduces the interferences among the signals coming from the flexible printed circuit film.
Abstract:
The invention relates to a high frequency component of layered structure, and a method for manufacturing the component. The component comprises at least one dielectric layer parallel to the layers of the layered structure, at least two transmission lines for transmitting electrical signals, at least one capacitor, each of which is formed by overlapping parts of two transmission lines, the overlapping parts being for forming capacitive interaction between the parts, and the overlapping parts being arranged to overlap each other in a transversal direction to a dielectric layer parallel to the layers of the layered structure, the dielectric layer being in between the overlapping parts.
Abstract:
Single-sided conductor patterned films are prepared, each of which has a conductor pattern formed only one side of a resin film and via hole filled with conductive paste. A single-sided conductor patterned film which has a conductor pattern formed only one side of a resin film and an opening formed in the resin film so as to expose an electrode is laminated on the single-sided conductor patterned films. Moreover, a cover layer with an opening to expose an electrode is laminated on a bottom surface of the single-sided conductor patterned films to form a laminate. Then, by pressing while heating the laminate, a multilayer substrate having the electrodes at both sides thereof can be produced.
Abstract:
Single-sided conductor patterned films are prepared, each of which has a conductor pattern formed only one side of a resin film and via hole filled with conductive paste. A single-sided conductor patterned film which has a conductor pattern formed only one side of a resin film and an opening formed in the resin film so as to expose an electrode is laminated on the single-sided conductor patterned films. Moreover, a cover layer with an opening to expose an electrode is laminated on a bottom surface of the single-sided conductor patterned films to form a laminate. Then, by pressing while heating the laminate, a multilayer substrate having the electrodes at both sides thereof can be produced.
Abstract:
A connector for communications systems has four input terminals and four output terminals, each arranged in an ordered array. A circuit electrically couples each input terminal to the respective output terminal and cancels crosstalk induced across the adjacent connector terminals. The circuit includes four conductive paths between the respective pairs of terminals. The first and third paths are in relatively close proximity and are substantially spaced from the second and fourth paths. The second and fourth paths are in relatively close proximity.
Abstract:
A connector for communications systems includes four input terminals and four output terminals in ordered arrays. A circuit electrically couples respective input and output terminals and cancels crosstalk induced across adjacent connector terminals. The circuit includes four conductive paths between the respective input and output terminals. Sections of two adjacent paths are in close proximity and cross each other between the input and output terminal. At least two of the paths have sets of vias connected in series between the input and output terminals. The sets of vias are adjacent.
Abstract:
A circuit board is provided having a plurality of vias and uniformly spaced connector stubs arranged upon one or both outer surfaces of the control board. Sets of trace conductors are formed within the control board between the vias. The trace conductors are arranged in two planes within the control board, wherein trace conductors within one plane are laterally offset from trace conductors in the other plane. Laterally offset trace conductors allow close spacing of the trace conductor planes while maximizing the spacing between trace conductors and corresponding reference conductors also placed within the control board. Additionally, the trace conductors are serpentine-shaped when viewed from a perspective perpendicular to the planar surface of the control board. The serpentine shape, in conjunction with carefully controlled spacing between planes of trace conductors as well as between the trace conductor planes and reference conductors, provides high impedance trace conductors in a limited space area necessary to meet SCSI specifications.