摘要:
To provide an easily bendable high-frequency signal line and an electronic apparatus which are capable of suppressing the deviation of the characteristic impedance of a signal line from a predetermined characteristic impedance. A dielectric body 12 is obtained by laminating a protection layer 14 and dielectric sheets 18a to 18c, and has a surface and an undersurface. A signal line 20 is a linear conductor disposed in the dielectric body 12. A ground conductor 22 is disposed in the dielectric body 12, faces the signal line 20 via the dielectric sheet 18a, and continuously extends along the signal line 20. A ground conductor 24 is disposed in the dielectric body 12, faces the ground conductor 22 via the signal line 20 sandwiched therebetween, and has a plurality of openings 30 arranged along the signal line 20. The surface of the dielectric body 12 on the side of the ground conductor 22 with respect to the signal line 20 is in contact with a battery pack 206.
摘要:
A connection substrate 13 includes a base material 130 formed by stacking a plurality of dielectric layers 130a to 130f and a plurality of through conductors 20 provided penetrating through the dielectric layers 130c to 130f adjacent to each other. A plurality of radiation shielding films 21a to 23 a formed integrally with each of the plurality of through conductors 20 and separated from each other are provided at two or more interlayer parts in the dielectric layers 130c to 130f. A region PR1 of the radiation shielding film 21a (21b) formed integrally with one through conductor 20 in one interlayer part projected onto a virtual plane normal to a predetermined direction and a region of the radiation shielding film 22b or 22c (22c) formed integrally with another through conductor 20 in another interlayer part projected onto the virtual plane do not overlap each other. Accordingly, the readout circuits of an integrated circuit device can be protected from radiation, and an increase in parasitic capacitance can be suppressed.
摘要:
Provided is a printed circuit board 100 capable of increasing an inductance value of a power pattern and a ground pattern while keeping a low electric resistance value of the power pattern and the ground pattern. The printed circuit board includes a printed wiring board 101 including: a power layer 113 having a power pattern 131 formed therein; and a ground layer 112 having a ground pattern 121 formed therein. On the printed wiring board, an LSI 102 as a semiconductor device and an LSI 104 as a power supply member are mounted. The ground pattern has a first ground region R that overlaps the power pattern as viewed from the direction perpendicular to the surface of the printed wiring board. In the first ground region, at least one defect portion 122 is formed. In the first ground region, the defect portion forms a region 121a that is narrower than the power pattern.
摘要:
A protection device (10) for protecting an electronic component or circuit against electrostatic discharge, the protection device comprising a substrate (14) formed from dielectric material; an electrically conductive ground plane (16) formed on one side of the substrate (14); an electrically conductive line (20) formed on the other side of the substrate (14), the conductive line (20) having a non-linear profile and including one or more sharp corners; a first circuit means (26) electrically connected to one end (28) of the conductive line (20) which is capable of diverting at least a portion of electrostatic discharge to electrical ground (16); and a second circuit means (32) electrically connected to the other end (34) of the conductive line (20) which is capable of diverting at least a portion of electrostatic discharge to electrical ground (16).
摘要:
The present invention concerns a multi layered printed circuit board, PCB, with via holes connecting different signal layers of the PCB. The via holes are connected to pads (905) in the signal layers and are surrounded by anti-pads (1425) in the ground layers. In accordance with the invention the pads have a shape wherein a first path, stretching from the center of the pad and substantially in a direction in which adjacent routing channels (305) extend, to a first point located on the edge of the pad, is longer than a second path, stretching from the center of the pad and substantially in a direction towards the adjacent routing channels to a second point located on the edge of the pad.
摘要:
The printed circuit board assembly for a POTS splitter comprises a printed circuit board PCB provided with one or more, e.g. 4, line interface connectors (X1 - X4) each connected to, e.g. n=12, low-pass filters (LPF1, LPR1; LPF2, LPR2; ... LPFn, LPRn) on the PCB. The line interface connectors are coupled to analog front end high-pass filters of the splitters on a line termination VDSL motherboard and so further to telecommunication lines towards Customer Premise Equipment CPE. To reduce the loading effect of each POTS splitter so that the Differential Mode Capacitance (Cdm1; Cdm2; ... Cdmn) of the line interface track towards the customer is smaller than 3pF, each low-pass filter is physically separated on the PCB into a front stage (LPF1; LPF2; ... LPFn) and a rear stage (LPR1; LPR2; ... LPRn). The front stage comprises at least one component of the low-pass filter, preferably the first inductor, and is connected and physically located on the PCB closer to the line interface connector (X1 - X4) than the rear stages.
摘要:
L'invention concerne un dispositif de raccordement pour signaux haute fréquence comprenant un circuit imprimé (10) sur une face externe (12) duquel est imprimée une ligne de transmission (13) et un connecteur coaxial (11) monté en surface du circuit imprimé (10) sur la face externe (12). L'invention trouve une utilité particulière pour la transmission de signaux radiofréquence en bande X, en particulier pour des fréquences de 9 à 10 GHz. La ligne de transmission (13) est raccordée au connecteur (11) au moyen d'un plot (15) appartenant à la ligne de transmission (13) sur lequel est rapportée une âme centrale du connecteur (11). Le circuit imprimé (10) comprend au moins un plan de masse interne (25) parallèle à la face externe (12) et contribuant à l'adaptation de la ligne de transmission (13). L'invention vise à améliorer la transparence de la transition entre le connecteur (11) et la ligne de transmission (13). Selon l'invention, le plan de masse interne (25) est ajouré au moyen d'une épargne (26) en regard du plot (15).
摘要:
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.
摘要:
A printed wiring board includes a body made of resin. Woven glass fiber yarns are impregnated in the resin of the body. An electrically-conductive wiring pattern is formed on the surface of the body. The wiring pattern extends in parallel with the glass fiber yarns. The width of the wiring pattern is set equal to or larger than the interval between the centerlines of the adjacent ones of the glass fiber yarns extending in parallel. The wiring pattern is reliably located in a region containing both the glass fiber and the resin. The proportion of the glass fiber to the resin is equalized on the wiring patterns. This results in a suppression of the influence resulting from a difference in the permittivity between the glass fiber and the resin on the wiring pattern. A variation of characteristic impedance is suppressed with such a simplified structure.