Abstract: A radio frequency circuit includes a switch having selection terminals, a switch, a filter connected to the selection terminal, a filter connected to the selection terminal, and a filter. The switch is connected in series to and between the filter and a path connecting the selection terminal and the filter.

Abstract: The invention includes: an image pickup device having a light receiving surface and a back surface; a first substrate having a first main surface, a second main surface, and four side surfaces, the first substrate comprising a stacked substrate including internal wirings; and a second substrate having a third main surface, a fourth main surface, and four side surfaces. A solder ball on the back surface and an electrode on the first main surface are bonded an electrode on the second main surface and an electrode on the third main surface are bonded, end portions of the internal wirings are, of the four side surfaces, not exposed on a first side surface and a second side surface, and exposed on a third side surface and a fourth side surface, and the exposed end portions are arranged only in a single layer of the stacked substrate.

Abstract: A rack shaft used for a dual-pinion electric power steering apparatus includes: a hollow first shaft in which a first rack for transmission of manual steering force is formed; and a solid second shaft in which a second rack for transmission of steering assist force is formed and which is coupled to the first shaft. A method for manufacturing a rack shaft includes: forming a first rack in a hollow first shaft by plastic working; coupling a solid second shaft to the first shaft after the plastic working; and forming a second rack in the second shaft by cutting after the coupling.

Abstract: A security method for a vehicle safe driving system provides drivers information for safe driving, that is, when a sensor does not detect any danger when there is a danger on the road, when there are some limits in the system operations, or when a portion of the system does not work.

Abstract: The security method for a vehicle safe driving system according to this invention is providing drivers to notice information for safe driving, when a sensor does not detect any danger when there is a danger on the road, when there are some limits in the system operations, or when a portion of the system does not work.