Abstract: There is provided a molded body having high fixing strength between a magnetic mold material and an external electrode. The molded body uses the magnetic mold material comprising at least 65 vol % of magnetic powder and up to 35 vol % of resin and the external electrode that has pits and projections on a surface that makes contact with the magnetic mold material. The external electrode and the magnetic mold material are integrally-molded such that at least a portion of the external electrode is exposed at at least one surface of the molded body. Spacing between the pit and projection of the external electrode is smaller than the maximum particle size of the magnetic powder.

Abstract: There is provided a wiring board. The wiring board includes: a semiconductor substrate having a through hole and covered with an insulating film; a through electrode formed in the through hole; a first wiring connected to one end of the through electrode; and a second wiring connected to the other end of the through electrode. The semiconductor substrate includes: a semiconductor element and a first guard ring formed to surround the through hole. The semiconductor element includes a first conductivity-type impurity diffusion layer having a different conductivity-type from that of the semiconductor substrate and is electrically connected to the first wiring and the second wiring.

Abstract: To provide a half-bridge switching power supply using a series resonance that can realize both of a smaller size and higher reliability of a device. In a half-bridge switching power supply including two switching elements and an LC resonant circuit including an inductor and capacitors for the series resonance, two switching elements Q1 and Q2 constituting the half bridge, a series-resonant inductor Lp, and two capacitors Co1 and Co2 for a series-resonant capacitor are used.

Abstract: Disclosed is a method of fabricating a Schottky barrier diode, which comprises the steps of laminating an N? type epitaxial layer having a thickness of 2 to 4 ?m, on an N+ type substrate layer, to form a semiconductor substrate; forming a P+ type guard ring at a given position of epitaxial layer, from the side of a top surface of the semiconductor substrate; dividing a portion of the epitaxial layer surrounded by the guard ring, into a plurality of unit regions each having one side length of 0.1 to 0.

Abstract: The object is to provide a safe non-contact electric power transmission apparatus reducing unnecessarily consumed electric power, while intermittently-operated or otherwise restrained electric power transmission is not performed, and heat is not generated when a metal such as a foreign object is placed.

Abstract: The present invention provides a low-cost current detection device having a magnetic sensor easily placed on a choke coil, wherein assembly and manufacturing costs are reduced and a product is miniaturized. A current detection device including a choke coil for smoothing an input current or an output current and a magnetic sensor 1a built into the choke coil to detect the input current or output current, wherein the choke coil is composed of: a pair of cores 5 provided with an outer magnetic leg 5a constituting a closed magnetic circuit and a center magnetic leg 5b for providing a gap; and an air core coil 6 mounted on the center magnetic leg 5b, and space 6b is provided to a part of winding of the air core coil 6 with the magnetic sensor 1a placed in the gap between the space 6b and the center magnetic leg 5b.

Abstract: Disclosed is a method of testing electrical characteristics of a semiconductor device having a ball-shaped external electrode. The method comprises preparing a plurality of cantilever-type contactors each supported by a support plate at a given position, and formed in such a manner that a tip thereof has a flat surface with an arc-shaped edge in an outer peripheral region thereof, and a cross-sectional diameter in a vicinity of the tip is greater than a radius of the ball-shaped external electrode, and pairing the cantilever-type contactors to provide paired two contactors.

Abstract: A miniature surface-mount electronic component which can ensure sufficient impact resistance and vibration resistance especially in an application to a severe use environment such as a vehicle-mounted coil, by putting some contrivance into a method for fixing a coil in a molding process and a method for holding a core and terminals. A miniature surface-mount electronic component including a bar-shaped core 2 on which a winding wire 3 is wound, and metal plates 5, with an outer casing 7 made of an insulating resin molded, includes flanges 2b substantially quadrangular in section at both ends of the bar-shaped core 2, and vertical grooves a and b are provided on side surfaces of the flanges 2b of the bar-shaped core 2 as fixing portions for preventing positional displacement occurring when the outer casing 7 is molded.

Abstract: The present invention provides a power transmission transformer of which workability in implementing and reliability of connection are considered in a noncontact power transfer device using individual self-oscillation circuits. The power transmission transformer for a noncontact power transfer device including a transmitting coil L1 and a drive coil L2 for self-oscillation on a power transmission device side includes a bobbin in which the transmitting coil and the drive coil L2 are disposed, in which the transmitting coil and the drive coil L2 are configured by an air-core coil using self-bonding wire, and the bobbin 1 includes a winder spindle 1a, 1b on both surfaces opposed to each other across a collar 2 formed of a flat plate, and a mating portion 3 for mating with an external portion in an end portion of the winder spindle 1b, and the drive coil L2 is mounted on the winder spindle 1b and the transmitting coil L1 is mounted on the other, opposed winder spindle 1a across the collar.

Abstract: A miniature surface-mount electronic component which can ensure sufficient impact resistance and vibration resistance especially in an application to a severe use environment such as a vehicle-mounted coil, by putting some contrivance into a method for fixing a coil in a molding process and a method for holding a core and terminals. A miniature surface-mount electronic component including a bar-shaped core 2 on which a winding wire 3 is wound, and metal plates 5, with an outer casing 7 made of an insulating resin molded, includes flanges 2b substantially quadrangular in section at both ends of the bar-shaped core 2, and vertical grooves a and b are provided on side surfaces of the flanges 2b of the bar-shaped core 2 as fixing portions for preventing positional displacement occurring when the outer casing 7 is molded.

Abstract: A high-density impurity diff-used layer of an identical conduction type to the semiconductor substrate on which the impurity is doped higher in density than the semiconductor substrate around the diffuse resistance region is provided, one side of the electrodes is formed extending to the high-density impurity diffused layer and the diffused resistance region and the high-density impurity diff-used layer are connected in a semiconductor strain gauge that is formed on the surface of the semiconductor substrate of a fixed conduction type and is provided with the diffused resistance region of opposite conduction type to the semiconductor substrate and is provided with electrodes on both ends of the diffused resistance region.

Abstract: Disclosed is a switching constant-current power supply system, comprising a feedback circuit 7 provided between a detector circuit 5 for generating a first feedback signal in proportion to a current flowing in a load 6, and a control circuit 4 for driving a first power converter circuit 3 which is provided on the input side of a second power converter circuit 10 to stabilize the load current. The feedback circuit 7 includes a signal hold section 8 for generating a second feedback signal. The feedback circuit 7 is operable to supply the first feedback signal to the control circuit 4 in a current supply period, and to supply the second feedback signal to the control circuit 4 in a current cutoff period. The second feedback signal has a signal value approximately equal to that of the first feedback signal appearing in the current supply period. The switching constant-current power supply system can stabilize the load current even under the condition that the load is repeatedly turned on/off.

Abstract: A method and circuits for improving the inductive DC converter delivery of regulated current into the load(s), where the inductive DC converter provides the output voltage to an ensemble consisting of the load(s) and a current source or a current source circuit connected in series with the load. The load current is controlled by the current source or the current source circuit in series with the load and not by the inductive DC converter, which only provides the voltage and power required at the output, without directly controlling the load current. The inductive DC converter can operate under much more relaxed specs, while the load current regulation is much tighter, being current source controlled.

Abstract: Disclosed is an input/output coupling structure for coupling a printed circuit board with a dielectric waveguide having a dielectric body and a conductive film covering the dielectric body. The coupling structure comprises a first conductive pattern formed on the bottom surface of the dielectric waveguide to serve as an input/output electrode, in such a manner as to be surrounded directly by an exposed portion of the dielectric body and further by the conductive film formed around the outer periphery of the exposed portion, a spacer having a surface made substantially entirely of a conductive material and a portion for defining a given space, and a second conductive pattern formed on a principal surface of the printed circuit board and electrically connected to the microstrip line.

Abstract: A plurality of individual circuits are formed on a substrate. Each of the individual circuits is formed with electrical contacts. A spacer is sealed onto the substrate, the spacer peripherally enclosing each of the individual circuits while exposing the conductive contacts. A cover is positioned over the spacer is and integral with it. First conductive feedthroughs penetrate the cover, the first conductive feedthroughs positioned peripheral to each of the individual circuits. Conductive pads are formed on a bottom surface of the cover, the conductive pads in electrical continuity with the conductive contacts of the individual circuits. Conductive paths are formed on the bottom surface of the cover, the conductive paths each joining at least one of the conductive pads with at least one of the first conductive feedthroughs thereby establishing electrical continuity between the individual circuits and the first conductive feedthroughs so as to establish pin-outs.

Abstract: A monolithic capacitance multiplication circuit serves to reduce the required die area when larger capacitance values are needed such as in filter and loop frequency compensation circuits. A current mirror/cascoding device arrangement reduces the effective series resistance of the multiplier capacitor. As a result, the multiplier topology exhibits improved bandwidth over prior art capacitance multiplier circuits.

Abstract: Disclosed is a switching-type constant current power supply, which comprises an alteration circuit 9 provided on the output side of a power conversion circuit 3 together with a voltage detection circuit 7, and a feedback circuit 8 provided between the voltage detection circuit 7, a current detection circuit 5 and a control circuit 4. The alteration circuit 9 is operable, during a current flow period where a load current IL is flowing, to set the signal level of a second feedback signal F2 at a value less than a reference voltage Vref to be supplied to a common error amplifier EA1 in a control circuit 4, and operable, during a current cut-off period where the load current IL is not flowing, to set the signal level of the second feedback signal F2 at a value greater than the reference voltage Vref.

Abstract: It is an object of the present invention to provide a solid-state image pickup device capable of preventing any output variation due to a threshold voltage variation, and preventing a dynamic range from being narrowed in conjunction with deterioration in outputs due to a lowered threshold voltage. The present invention provides improvements in type and connection of a reset transistor, a select transistor, and an amplifier transistor to achieve the above object. Specifically, the present invention provides a solid-state image pickup device comprising a first MOS transistor serving as a reset switch, a second MOS transistor serving as a select switch, a photodiode, and a third MOS transistor having a source connected in series with the photodiode.

Abstract: Disclosed is a variable output-type constant current source circuit capable of varying its output current in a stepwise manner without the complication in circuit configuration and the increase in size of a semiconductor circuit board for incorporating the circuit therein. The constant current source circuit comprises a first self-biasing type constant current circuit 3a configured such that transistors M1, M2 are operable to cooperatively supply a given voltage across a resistor RS to generate a stabilized current IR1. In order to vary the output current, the constant current source circuit includes a switching circuit 5 (transistor M5) connected in series to a series circuit connecting in series the transistor M1 and the resistor RS, and a second constant current circuit 4 connected in parallel to a series circuit connecting in series the transistor M1, the resistor RS and the transistor M5.

Abstract: Disclosed is a waveguide-type dielectric filter, which comprises a dielectric block, a plurality of resonators formed in the dielectric block, and a coupling portion for adjusting the coupling between the adjacent resonators. The dielectric block includes a pair of dielectric substrates which are divided in the arranging direction of the resonators and joined together through joint surfaces thereof, and a slot formed between the joint surfaces. The slot defines a through-hole severing as the coupling portion between the adjacent resonators. The slot may be formed in each of the joint surfaces or may be formed in only one of the joint surfaces. The above dielectric filter may include input and output sections, and a conductive film may be formed between the joint surfaces to provide a coupling portion of the input or output section. The present invention can provide a waveguide-type dielectric filter capable of being readily produced without causing any problem of mechanical strength.