Abstract: The present invention provides a battery-driven electronic device for which a long time use of the battery can be achieved and mobile communications equipment such as a portable telephone. Even if the time at which the output voltage of a battery 201 becomes below the supply voltage required by a load 206 including a power amplifier for wireless communications comes earlier than a conventional lithium ion battery because of its discharge characteristics that the battery voltage change ratio is 0.25 or more, a step-up and -down converter 200 operates as follows. When the output voltage of the battery is higher than the supply voltage required by the load, the voltage is set to a predetermined supply voltage by the step-down operation mode. When the output voltage of the battery is decreased and becomes lower than the supply voltage required by the load, the voltage is set to a predetermined supply voltage by the step-up operation mode.

Abstract: An arc welding method which suppresses sputtering and which makes it possible to obtain a smooth bead penetration surface shape as in MIG or MAG welding, without producing undercuts or bumping beads. A carbon dioxide gas welding method effecting welding at welding rates of about not less than 1.

Abstract: A thermally conductive substrate having a structure in which inorganic filler for improving the thermal conductivity and thermosetting resin composition are included. The thermosetting resin composition has a flexibility in the not-hardened state, and becomes rigid after hardening. The thermally conductive substrate has excellent thermal radiation characteristics. The method of manufacturing the thermally conductive substrate includes: piling up (a) the thermally conductive sheets comprising 70 to 95 weight parts of an inorganic filler, and 4.

Abstract: In a DC-DC converter equipped with an operation mode (standby operation mode) which is only for reducing consumption power in a light load state such as at the time of a start-up, there is an output power dive detecting circuit disposed which outputs a result of a comparison of an upper limit output voltage E1, which is higher a predetermined voltage than a target output voltage E0, with an output DC voltage Vo. The DC-DC converter does not enter the standby operation mode when the output DC voltage Vo is higher than the upper limit output voltage E1, which greatly improves a response speed at which the output DC voltage Vo efficiently reaches the target output voltage E0.

Abstract: A circuit component package of the present invention includes a mounting member including a substrate and a wiring pattern provided on the substrate, a circuit component including a component body and an external electrode provided at an end of the component body, the circuit component being arranged on the mounting member, and a conductive material that electrically connects the external electrode with the wiring pattern. In the circuit component, the component body is shaped so that a first portion of the component body on which the external electrode is provided is thinner than a second portion of the component body, the second portion being a portion on which the external electrode is not provided, and further, the external electrode is arranged in a region on a side on which the component body is positioned with respect to a reference plane containing a predetermined surface of the component body.

Abstract: A capacitor is provided so as to include: a capacitor element including a dielectric layer, and an anode and a cathode that are arranged to support the dielectric layer therebetween; a planar anode terminal; and a planar cathode terminal. The anode terminal and the cathode terminal are led out from the capacitor element in a same direction so as to be in parallel with each other, and at least a part of the anode terminal and at least a part of the cathode terminal overlap each other without contact in a direction perpendicular to a terminal plane of at least one terminal selected from the anode terminal and the cathode terminal. A capacitor built-in board using the capacitor also is provided.

Abstract: A method for calculating the shape of a bead of a welded part by solving the problem of multiple solutions when the shape causing a recess or undercut in the flange is determined by calculation. The geometry data on the object to be welded, the characteristic parameters of the object and welding environment, and the welding conditions are set. Under the welding conditions, the melting part of the object is inferred by heat conduction calculation. The coordinates are rotated about an axis parallel to the direction of the welding and/or about an axis perpendicular to the welding direction for the inferred melting part. A difference lattice is set for the coordinate-rotated melting part. The displacement of the melting part for which the difference lattice is set is calculated by a curved surface equation.

Abstract: A circuit component package of the present invention includes a mounting member including a substrate and a wiring pattern provided on the substrate, a circuit component including a component body and an external electrode provided at an end of the component body, the circuit component being arranged on the mounting member, and a conductive material that electrically connects the external electrode with the wiring pattern. In the circuit component, the component body is shaped so that a first portion of the component body on which the external electrode is provided is thinner than a second portion of the component body, the second portion being a portion on which the external electrode is not provided, and further, the external electrode is arranged in a region on a side on which the component body is positioned with respect to a reference plane containing a predetermined surface of the component body.

Abstract: A magnetic device includes a sheet-type coil including a planar conductive coil and an insulating substance; and a sheet-type first magnetic member disposed on at least one of upper and lower surfaces of the sheet-type coil, where a magnetic permeability of the insulating substance is smaller than a magnetic permeability of the first magnetic member. The magnetic device preferably includes a second magnetic member provided at a predetermined area of the sheet-type coil, the second magnetic member being made of a resin containing a magnetic powder and having a permeability larger than the insulating substance and smaller than the first magnetic member. The predetermined area is at least one position selected from a center portion and a peripheral portion of the sheet-type coil where a conductor constituting the planar conductive coil is not present. Further, a power supply module of the present invention includes this magnetic device according to the present invention.

Abstract: A miniature solid electrolytic capacitor is provided, which is suitable for being disposed within an electrically insulating layer, and is connected to other component using an electrically conductive adhesive with a connection resistance at an anode low and with connection reliability improved. Specifically, the electrolytic capacitor includes a valve metal element for an anode 10 having a capacitor forming part 10A and an electrode lead part 10B, a dielectric oxide film 11 formed on the valve element, a solid electrolyte layer 12 formed on the dielectric oxide film 11 and a charge collecting element for a cathode 13 formed on the solid electrolyte layer 12, wherein at least one through hole 15 is formed in the electrode lead part 10B so as to expose a core 10C of the valve metal element, and an exposed portion 10D of the core is used for connecting portion.

Abstract: A technique for judging a welding quality for acceptance or rejection and displaying the result in diagrams, and an automatic welding device incorporating the technique therein. When an operation result record status judging means judges that past operation records are available, temperature distribution operation result records at joints of works to be welded are displayed by a weld penetration display means (23) and bead surface shape operation result records are displayed by a bead surface shape display means (25), whereby time required for operation by a temperature distribution operation means and time required for operation by a bead surface shape operation means (24) are omitted by an operation time omitting means incorporated in the automatic welding device.

Abstract: It is an object of the invention to easily carry out, through an analyzing computer on a manufacturer side, the adjustment of a robot which is to be performed by an operator of a manufacturer going to the factory of a user and to immediately cope with a request for the maintenance and adjustment of the user without stopping the line of the factory.

Abstract: A power module of the present invention mounts electronic components and comprises a circuit board that constitutes an electric power conversion circuit along with the above-mentioned electronic components; a heat sink; and a member with insulation characteristics and high thermal conductivity, which is disposed between plural devices with high heating value among the above-mentioned electronic components and the above-mentioned heat sink, embeds at least part of each of the above-mentioned plural devices with high heating value therein and transfers heat from the above-mentioned plural devices with high heating value to the above-mentioned heat sink.

Abstract: The present invention provides a battery-driven electronic device for which a long time use of the battery can be achieved and mobile communications equipment such as a portable telephone. Even if the time at which the output voltage of a battery 201 becomes below the supply voltage required by a load 206 including a power amplifier for wireless communications comes earlier than a conventional lithium ion battery because of its discharge characteristics that the battery voltage change ratio is 0.25 or more, a step-up and -down converter 200 operates as follows. When the output voltage of the battery is higher than the supply voltage required by the load, the voltage is set to a predetermined supply voltage by the step-down operation mode. When the output voltage of the battery is decreased and becomes lower than the supply voltage required by the load, the voltage is set to a predetermined supply voltage by the step-up operation mode.

Abstract: A capacitor is provided so as to include: a capacitor element including a dielectric layer, and an anode and a cathode that are arranged to support the dielectric layer therebetween; a planar anode terminal; and a planar cathode terminal. The anode terminal and the cathode terminal are led out from the capacitor element in a same direction so as to be in parallel with each other, and at least a part of the anode terminal and at least a part of the cathode terminal overlap each other without contact in a direction perpendicular to a terminal plane of at least one terminal selected from the anode terminal and the cathode terminal. A capacitor built-in board using the capacitor also is provided.

Abstract: A composition for substrate materials according to the present invention includes 70-95 wt. % of inorganic powder and 5-30 wt. % of thermosetting resin composition and is in a finely crushed condition. The composition for substrate materials is prepared, for example, by crushing into fine pieces and mixing the inorganic powder and the thermosetting resin composition. A heat conductive substrate is provided with an insulator body formed by heating and pressurizing said composition for substrate materials and a wiring pattern is provided in such a condition that it is exposed on the surface of the insulator body. A process for manufacturing the heat conductive substrate comprises forming said composition for substrate materials into the insulator body by casting the above mentioned composition for substrate materials into a metal mold to be heated and pressurized so that said thermosetting resin is cured.

Abstract: In a DC-DC converter equipped with an operation mode (standby operation mode) which is only for reducing consumption power in a light load state such as at the time of a start-up, there is an output power dive detecting circuit disposed which outputs a result of a comparison of an upper limit output voltage E1, which is higher a predetermined voltage than a target output voltage E0, with an output DC voltage Vo. The DC-DC converter does not enter the standby operation mode when the output DC voltage Vo is higher than the upper limit output voltage E1, which greatly improves a response speed at which the output DC voltage Vo efficiently reaches the target output voltage E0.

Abstract: A circuit component package of the present invention includes a mounting member including a substrate and a wiring pattern provided on the substrate, a circuit component including a component body and an external electrode provided at an end of the component body, the circuit component being arranged on the mounting member, and a conductive material that electrically connects the external electrode with the wiring pattern. In the circuit component, the component body is shaped so that a first portion of the component body on which the external electrode is provided is thinner than a second portion of the component body, the second portion being a portion on which the external electrode is not provided, and further, the external electrode is arranged in a region on a side on which the component body is positioned with respect to a reference plane containing a predetermined surface of the component body.

Abstract: A welding voltage is determined based on an expression, P=k2×Vw2+k3×Vw, where, with a welding wire feed speed and a welding wire radius used as inputs, a power factor is P(kW), the a melting speed of a welding wire is Vw(g/sec), and k2 and k3 are constants(k2=0.898 and k3=4.625).

Abstract: To provide a power amplifier circuit with a smaller circuit scale and with good characteristics over a wide range of load impedance. A configuration includes: a DC/DC converter 2108 which delivers a supply voltage from a battery 2111 to a power amplifier 1302 according to control commands from a control circuit 2109; a directional coupler 2101 which outputs a signal from one terminal 2101a according to signal waves received by an antenna 1306 from a second matching circuit 105 and outputs a signal from another terminal 2101b according to reflected waves received from the antenna 1306; and detectors 2102 and 2103 or the like.