摘要:
The present invention provides a highly safe charging circuit with which overcharge of a secondary battery will never occur even when a failure occurs in a transistor or the like that controls the charging voltage or charging current or when a protection circuit does not operate normally. In a secondary battery charging circuit 4 that charges a secondary battery E2 with an input power source voltage, the power source voltage is set to a voltage (e.g. 4.0 V) that is lower than the full-charge voltage (e.g. 4.2 V) of the secondary battery. When the voltage of the secondary battery E2 is lower than the power source voltage, a constant current circuit operates to perform constant current charging without voltage step-up, and when the voltage of the secondary battery E2 is higher than the power source voltage and lower than the full-charge voltage, a voltage step-up circuit operates to perform constant current charging with voltage step-up.
摘要:
According to one embodiment, a printed circuit board includes a first dielectric layer, a circuit component mounted on the first dielectric layer, and a second dielectric layer. The first dielectric layer is provided with a via hole which opens at a surface thereof and in which a conductive layer is provided, and a conductive pattern connected electrically to the conductive layer of the via hole. The circuit component is provided with a bump at least a part of which is inserted in the via hole and bonded to an inner surface of the via hole. The second dielectric layer is formed provided with another conductive pattern and laminated to the first dielectric layer to cover the circuit component.
摘要:
According to one embodiment, a component-embedded printed wiring board includes a base including a component mounting surface, a pair of conductive patterns which is disposed on the component mounting surface of the base, and a circuit component which is mounted on the base so as to be in close contact with the component mounting surface between the conductive patterns and electrically connected to the conductive patterns.
摘要:
According to one embodiment, a printed-wiring board with a built-in component includes a first base material including a component mounting surface. A circuit component is mounted on the component mounting surface of the first base material. A stress relaxation material covers the circuit component. A second base material is stacked on the first base material by interposing, between the first base material and the second base material, an insulating layer covering the stress relaxation material.
摘要:
According to one embodiment, there is provided a printed-wiring board with a component in which an electronic component is mounted on a pattern-forming surface of a base material. In the printed-wiring board, a guiding path for guiding, to the outside, a void formed in mounting the electronic component is formed on the pattern-forming surface.
摘要:
In view of the above-discussed state of the art, it is an object of the present invention to provide a method of coating an electric wire by which insulated wires excellent in dielectric breakdown voltage can be obtained by a relatively short period of dipping of articles to be coated in an electrodeposition bath. A method of coating an electric wire comprising cationic electrocoating with a cationic electrodeposition coating composition, wherein the cationic electrodeposition coating composition contains a resin composition having a hydratable functional group reducible directly by an electron and results in forming passive coat.
摘要:
Disclosed is an IC package including an interpose substrate and lands for external connection disposed on a face of the interpose substrate in a grid pattern, the interpose substrate having a penetration hole on at least a position between the lands for external connection disposed in a grid pattern. Besides, there are disclosed an inspection method of an IC package mounting body mounting this IC package, a repairing method of an IC package mounting body mounting this IC package, and an inspection pin for an IC package mounting body used for such an inspection.
摘要:
This invention is a three-dimensional image drawing apparatus that comprises a frame buffer for storing display data corresponding to a display screen in a display apparatus, and a two-dimensional drawing circuit for performing coordinate operations in order to draw specific two-dimensional images in the frame buffer. The apparatus also uses a Z buffer for storing depth data in order to perform three-dimensional drawing to the frame buffer, and a three-dimensional straight line drawing circuit for making three-dimensional drawings to the frame buffer based on the depth data stored in the Z buffer. The apparatus also uses a memory control circuit for controlling access to the buffers, and a bit number altering circuit for altering the number of bits per pixel in the coordinate operations of the two-dimensional drawing circuit either to a number of bits corresponding to the drawing data in the frame buffer or to a number of bits corresponding to the depth data in the Z buffer. The areas of both the frame buffer and Z buffer here are established in the same physical memory.
摘要:
A graphic LSI is for use in an image processing apparatus having a buffer memory circuit for buffering a drawing data in a specific address to display the drawing data as a graphic drawing on a display unit. The graphic LSI comprises a graphic drawing circuit for producing the specific address in accordance with a drawing command and a debug circuit for putting the image processing apparatus into a debug state when the specific address is coincident with a predetermined address.