Abstract:
In a multi-layer substrate module receiving from an external earth node (20) supply of a reference potential (Vss) for grounding, a plurality of ground lines (170-1, 170-2, 170-3) are provided respectively corresponding to a plurality of internal circuits (210, 220, 230). Moreover, a common node (Ncmn) for coupling the ground lines (170-1, 170-2, 170-3) is provided in an insulating layer (105C) of the multi-layer substrate module. The common node (Ncmn) is electrically coupled to the earth node 20 through a ground pin terminal 204 shared by the plurality of internal circuits (210, 220, 230). Preferably, the common node (Ncmn) is provided in the lowest insulating layer of the multi-layer substrate module. Thus, parasitic inductance of the portion through which an earth current flows, that is, the portion common to the plurality of internal circuits (210, 220, 230), can be suppressed with a small number of ground pin terminals. Accordingly, the inflow phenomenon of the earth current between the plurality of internal circuits (210, 220, 230) is prevented, enabling stable operation.
Abstract:
A filet F is added to a portion constituting a corner portion C equal to or smaller than 90° in a crossing portion X of wiring patterns 58b, 58c and 58d, and a wiring pattern 58 is formed. Since the filet F is added, the wiring patterns are not made thin and are not disconnected in the crossing portion X. Further, since there is no stress concentrated to the crossing portion X, disconnection is not caused in the wiring patterns and no air bubbles are left between the crossing portion X of the wiring patterns and an interlayer resin insulating layer so that reliability of a printed wiring board is improved.
Abstract:
Un agencement de chauffage permettant de chauffer un siège (1) comporte un moyen (7) réagissant à la température, ainsi que des moyens de commande (21) permettant de commander l'alimentation en courant électrique dudit moyen de chauffage encastré dans ledit siège (1). Lesdits moyens de commande se composent de composants (9) montés sur une plaque (8) de circuits imprimés souple.
Abstract:
Le dispositif décrit, qui sert à répartir uniformément le courant et la tension, comprend des première (16) et seconde bornes (26), un premier bus électrique (14) connecté électriquement à la première borne, un second bus électrique (24) isolé électriquement du premier bus électrique et connecté électriquement à la seconde borne, ainsi que plusieurs composants électriques (40) connectés entre les premier et second bus, de façon à former plusieurs trajets de circuits d'égale longueur, chaque trajet de circuit s'étendant entre la première borne, le premier bus électrique, l'un des composants de circuit, le second bus électrique et la seconde borne. Les composants électriques sont connectés aux premier et second bus en des points qui sont équidistants des première et seconde bornes respectivement.
Abstract:
A second conductor plane (102) is formed in a layer different from a layer in which a first conductor plane (101) is formed, and faces the first conductor plane (101). A first transmission line (104) is formed in a layer different from the layers in which the first conductor plane (101) and the second conductor plane (102) are formed, and faces the second conductor plane (102), and one end thereof is an open end. A conductor via (106) connects the other end of the first transmission line (104) and the first conductor plane (101). An insular conductor (112) is connected to a portion of the first transmission line (104) other than a portion thereof at which the transmission line (104) is attached to the conductor via (106), is located in a layer different from the layer in which the second conductor plane (102) is located, and faces the second conductor plane (102).
Abstract:
Leiterplatte mit Terminierung einer T-förmigen Signalleitung mit wenigstens zwei Leitungsenden, wobei ein Leitungsende mit einem Abschlusswiderstand gegen eine Versorgungsspannung terminiert wird und das andere Leitungsende gegen das Bezugspotential (Masse) der Versorgungsspannung terminiert wird.
Abstract:
A printed wiring board having a conductor portion and a wiring pattern, wherein a narrow width portion is formed in the wiring pattern in accordance with a distance from an adjacent conductor portion.