摘要:
A method for logic design of an integrated circuit IC in which at least one parameter concerning wiring line capacitances is used. The parameter can be precisely estimated even at a logic design stage preceding a layout design stage. The estimation is carried out by, first, classifying the logic units or the logic gates of the IC into hierarchal functional blocks. Second, specifying, for each closed network defined by delay paths, a higher level functional block in which the closed network is contained. Third, specifying lower level functional blocks enclosed by the higher functional block. Fourth, calculating the estimated wiring line capacitances of the closed network in accordance with predetermined data concerning both fan-out and actual wiring line capacitances. The data, used for the estimation, are varied in accordance with the degrees of the hierarchal level.
摘要:
An image forming apparatus is disclosed that includes a power storage unit. The power storage unit includes a constant voltage generation part configured to generate a constant voltage from a commercial power supply, the constant voltage generation part being connected to an external apparatus operating by consuming power; a voltage increasing circuit configured to increase the constant voltage generated by the constant voltage generation part; a capacitor configured to store an electric charge supplied from the voltage increasing circuit; a circuit control part configured to control charging of the capacitor; and an output part configured to output power stored in the capacitor, the power having a voltage different from the constant voltage.
摘要:
The liquid crystal display device according to the present invention includes a pair of substrates, and a liquid crystal layer disposed between the pair of substrates, wherein the liquid crystal layer includes a liquid crystal material having a negative dielectric constant anisotropy, at least one of the pair of substrates is provided with an alignment film for vertically aligning adjacent liquid crystal molecules, and a polymer layer formed on the alignment film for controlling the alignment of the adjacent liquid crystal molecules, the polymer layer is formed by polymerization of at least one monomer, the polymerization being initiated by radicals generated of the monomer upon absorption of light, the alignment film includes a polymer compound having a main chain that contains an imide structure, and the main chain has an imidization ratio of 50% or more.
摘要:
An image forming apparatus is disclosed that includes a power storage unit. The power storage unit includes a constant voltage generation part configured to generate a constant voltage from a commercial power supply, the constant voltage generation part being connected to an external apparatus operating by consuming power; a voltage increasing circuit configured to increase the constant voltage generated by the constant voltage generation part; a capacitor configured to store an electric charge supplied from the voltage increasing circuit; a circuit control part configured to control charging of the capacitor; and an output part configured to output power stored in the capacitor, the power having a voltage different from the constant voltage.
摘要:
A power storage device includes an alternating current (AC) power source, a field effect transistor (FET), a capacitor bank, a direct current (DC) fixing heater, a step-down chopper circuit, and an output control unit. The FET switches between a first path and a second path to supply power from the AC power source in combination with a diode and an IGBT. The capacitor bank is arranged on the first path, and includes capacitor cells. The DC fixing heater is arranged on the second path. The step-down chopper circuit is arranged on the first path, and changes a voltage value of power supplied from the AC power source. The output control unit controls, when power is supplied to the first path, controls the step-down chopper circuit to change a voltage value based on a charging voltage of the capacitor cells.
摘要:
An image forming apparatus is disclosed that includes a power storage unit. The power storage unit includes a constant voltage generation part configured to generate a constant voltage from a commercial power supply, the constant voltage generation part being connected to an external apparatus operating by consuming power; a voltage increasing circuit configured to increase the constant voltage generated by the constant voltage generation part; a capacitor configured to store an electric charge supplied from the voltage increasing circuit; a circuit control part configured to control charging of the capacitor; and an output part configured to output power stored in the capacitor, the power having a voltage different from the constant voltage.
摘要:
Provided is an optical waveguide connecting structure, having a first optical waveguide film cut in such a manner that a first core layer surface is exposed along an optical path direction in a slightly slant section forming an angle of about 5° or smaller, and a second optical waveguide film in which a second core layer is formed at a position opposed to the exposed surface of the first core layer in a slightly slant section forming an angle of about 5° or less with an optical path of the first core layer. The first core layer and the second core layer are connected at approximately the same height position from a reference surface.
摘要:
Occurrence of EMI is reduced without a sharp increase of the manufacturing cost by suppressing a common mode current stably. There is provided a disclosed printed-circuit board being adapted such that a width of an outer edge section of a T-shaped pattern is widened so as to surround a recessed section with a frame-shaped additional electric conductor by electrically connecting the frame-shaped additional electric conductor with the T-shaped pattern making up a ground pattern so as to close the recessed section.
摘要:
An optical module and its manufacturing method are provided which are capable of forming an optical waveguide by making the most of characteristics of a material having small optical transmission loss and excellent machinability or processibility. The optical module includes an optical waveguide sheet having a first optical waveguide and an optical component having a second optical waveguide, wherein the optical component is disposed in an aperture portion in the optical waveguide sheet and an end face of a large diameter portion of a core layer in the second optical waveguide is formed so as to be disposed opposite to an end face of a core layer of the first optical waveguide so that the first optical waveguide and the second optical waveguide are optically coupled.
摘要:
In a broadcasting satellite, signals transmitted through an up transmission line of a Ka band, which includes a plurality of communication channels, are received by a Ka-band antenna. The signals received by the antenna are passed through band-pass filters to thereby extract a broadcasting signal transmitted through each communication channel. Those of the thus-extracted broadcasting signals, which have been transmitted through predetermined communication channels, are synthesized by each of synthesizers, then amplified by a corresponding one of high power amplifiers, and output to a corresponding one of a plurality of primary radiators employed in an S-band antenna. The S-band antenna transmits each synthesized signal to a predetermined area that corresponds to a corresponding primary radiator. Thus, the system can be made to a simple structure, and the service area can be changed for each broadcasting signal.