Abstract: A printed circuit board includes a ground layer, a power source layer, a signal wiring layer, an insulating layer and an electromagnetic radiation suppressing member. The power source layer is provided to be opposed to the ground layer. The signal wiring layer transmits a signal in a predetermined frequency domain. The insulating layer insulates the ground layer, the power source layer and the signal wiring layer from one another. The electromagnetic radiation suppressing member is provided to cover a circumferential edge of the insulating layer. The electromagnetic radiation suppressing member has a negative dielectric constant and a positive magnetic permeability in a frequency domain including the predetermined frequency domain.

Abstract: A seat reclining device has a torsion spring for a cam, and a plurality of guide-protrusion pairs formed integral with the inside face of a stationary member for guiding movement of tooth blocks into and out of meshed-engagement with an internal tooth of a movable member. Two opposing circular-arc concave portions are formed on opposing faces of two circumferentially adjacent guide-protrusion sets. A space between the concave portions is dimensioned to be wider on a radially outward side for defining a spring accommodation space, and dimensioned to be narrower on a radially inward side for forming circumferentially-opposing convex portions. Two spring hooks engage with the respective convex portions under preload. One of the hooks is also engaged with the cam for forcing it in its locked direction. An anti-rotation protrusion is formed on the outside face of the stationary member at a position conforming to the spring accommodation space.

Abstract: A composite right/left-handed line device includes plural electrodes, plural dielectric substances and plural magnetic substances. The plurality of electrodes each include a pair of electrode plates, and a connection piece connected to the pair of electrode plates. The plurality of electrodes are disposed at regular intervals in a thickness direction between a pair of input terminals and a pair of output terminals. The plurality of dielectric substances are interposed between opposite surfaces of the pairs of electrode plates of adjacent two of the electrodes. The plurality of magnetic substances are disposed adjacently to the dielectric substances, respectively. The plurality of magnetic substances are interposed between opposite surfaces of the connection pieces of adjacent two of the electrodes.

Abstract: A vehicle seat reclining apparatus comprises a base member to be connected to one of a seat cushion and a seat back, a rotation member which is to be connected to the other of the seat cushion and seat back, which is arranged to rotate relative to the base member and which includes an internal gear, a regulating member to regulate axial movement of the rotation member relative to the base member, and a locking setup which includes an external gear and which is arranged to move between a lock position to engage the external gear with the internal gear and an unlock position for disengagement. The base member includes an outer circumferential portion defining a circular recess, the rotation member includes an outer circumferential portion including a cylindrical portion fit rotatably in the outer circumferential portion of the base member.

Abstract: According to an aspect of the invention, a semiconductor device includes a substrate having an opening area, a first semiconductor chip, and a second semiconductor chip. The first semiconductor chip has a first electrode for high-speed communication and that is disposed around the opening area on the substrate. The second semiconductor chip has a second electrode and third electrode for power and low-speed communication and that is disposed on the first semiconductor chip so that the first electrode is coupled with the second electrode by electrostatic coupling and dielectric coupling, the third electrode facing the opening area.

Abstract: A power source noise analysis device includes an analysis portion. The analysis portion estimates an internal impedance of a semiconductor chip being an object to be analyzed based on a power current waveform, which is obtained by simulation of the semiconductor chip based on design data of the semiconductor chip. The analysis portion carries out a noise analysis of a power system including a board having the semiconductor chip mounted thereon based on the internal impedance.

Abstract: A seat reclining device has a torsion spring for a cam, and a plurality of guide-protrusion pairs formed integral with the inside face of a stationary member for guiding movement of tooth blocks into and out of meshed-engagement with an internal tooth of a movable member. Two opposing circular-arc concave portions are formed on opposing faces of two circumferentially adjacent guide-protrusion sets. A space between the concave portions is dimensioned to be wider on a radially outward side for defining a spring accommodation space, and dimensioned to be narrower on a radially inward side for forming circumferentially-opposing convex portions. Two spring hooks engage with the respective convex portions under preload. One of the hooks is also engaged with the cam for forcing it in its locked direction. An anti-rotation protrusion is formed on the outside face of the stationary member at a position conforming to the spring accommodation space.

Abstract: A composite right/left-handed line device includes plural electrodes, plural dielectric substances and plural magnetic substances. The plurality of electrodes each include a pair of electrode plates, and a connection piece connected to the pair of electrode plates. The plurality of electrodes are disposed at regular intervals in a thickness direction between a pair of input terminals and a pair of output terminals. The plurality of dielectric substances are interposed between opposite surfaces of the pairs of electrode plates of adjacent two of the electrodes. The plurality of magnetic substances are disposed adjacently to the dielectric substances, respectively. The plurality of magnetic substances are interposed between opposite surfaces of the connection pieces of adjacent two of the electrodes.

Abstract: A printed circuit board includes a ground layer, a power source layer, a signal wiring layer, an insulating layer and an electromagnetic radiation suppressing member. The power source layer is provided to be opposed to the ground layer. The signal wiring layer transmits a signal in a predetermined frequency domain. The insulating layer insulates the ground layer, the power source layer and the signal wiring layer from one another. The electromagnetic radiation suppressing member is provided to cover a circumferential edge of the insulating layer. The electromagnetic radiation suppressing member has a negative dielectric constant and a positive magnetic permeability in a frequency domain including the predetermined frequency domain.

Abstract: In a printed circuit board of the invention, a first signal wiring layer, a first ground layer, a second ground layer and a second signal wiring layer are laminated via an insulating material. A first signal wiring is formed on the first signal wiring layer and a second signal wiring is formed on the second signal wiring layer. The two signal wirings are connected via a first through hole. The conductive first ground layer and the conductive second ground layer are connected via a second through hole. The second through hole is insulated from the first through hole and formed so as to surround the first through hole.