Abstract: An apparatus is disclosed that implements a switchable electromagnetic ring. In an example aspect, the apparatus includes a wireless transceiver with an electromagnetic circuit and at least one switchable electromagnetic ring. The electromagnetic circuit is configured to generate an electromagnetic field. The at least one switchable electromagnetic ring includes a switch and a conductive element. The switch has a first terminal and a second terminal. The conductive element is connected between the first terminal and the second terminal. At least a portion of the conductive element is positioned within the electromagnetic field.

Abstract: To provide a magnetic element such as a pot-shaped inductor in which a coil is covered by a magnetic body, having excellent cooling performance and being capable of suppressing heat generation. An inductor 1 as the magnetic element is provided with a coil formed by winding a winding wire, a magnetic body 2 in which the coil 5 is arranged and which transmits magnetic flux generated by the coil 5. The magnetic body 2 includes an air-cooling portion for air-cooling the magnetic element, on a magnetic body outer diameter portion which covers an outer diameter side of the coil 5. The air cooling portion is formed of a slit 7 as a hole structure penetrating the magnetic body outer diameter portion. Further, in a configuration in which the coil is sealed by a sealing resin, the magnetic body includes a flow control path, which controls a flow of the resin in filling the sealing resin, on a surface facing the coil.

Abstract: A modular reconfigurable indoor antenna is disclosed. The antenna may include a bottom piece, a top piece, and a plurality of vertical members. The top piece may include an Ultra High Frequency (UHF) reception element. The plurality of vertical members may be disposed between the bottom piece and the top piece and coupled therewith. At least one of the plurality of vertical members may include a Very High Frequency (VHF) reception element.

Abstract: A guide wire has a distal end incorporating a coil and a capacitive element that form a resonance circuit with a resonance frequency that is responsive to the pressure of blood external to the guide wire. The resonance frequency can be detected wirelessly, or through two contacts at the proximal wire end, or through one brush contact located inside an insertion sheath and a ground electrode. Wireless detection can be implemented via a second resonance circuit, and electronics for determining the frequency when the first and second circuits are in resonance with each other.

Abstract: A printed circuit board, and more particularly, a printed circuit board that provides a variable inductance. A printed circuit board includes: an inductor positioned between an input terminal and an output terminal; a switch connected to the inductor; and a controller connected to the output terminal and the switch and outputting a control signal for controlling the switch to the switch, wherein the inductor is formed of a plurality of circuit patterns having different plating thicknesses and signal paths for the plurality of circuit patterns are selectively connected by operation of the switch according to the control signal.

Abstract: [Problem] There is a need for a chip component which has excellent mountability, which can accommodate multiple types of requested values with a common basic design, and which has improved geometric accuracy and micromachining accuracy. [Solution] A chip resistor (10) (chip component) which includes: a substrate (11); an element circuit network (20, 21) which includes multiple element parts formed on the substrate (11); an external connection electrode (12) provided on the substrate (11) for external connection to the element circuit network (20, 21); multiple fuses provided on the substrate (11) for detachably connecting the element parts and the external connection electrode (12); and a solder layer (124) formed on the external connection terminal of the external connection electrode (12).

Abstract: A varainductor including a signal line disposed over a substrate. The varainductor further includes a first ground plane over the substrate, the first ground plane disposed on a first side of the signal line, and a second ground plane over the substrate, the second ground plane disposed on a second side of the signal line opposite the first side of the signal line. The varainductor further includes a first floating plane over the substrate, the first floating plane disposed between the first ground plane and the signal line, and a second floating plane over the substrate, the second floating plane disposed between the second ground plane and the signal line. The varainductor further includes an array of switches, the array of switches is configured to selectively connect the first ground plane to the first floating plane, and to selectively connect the second ground plane to the second floating plane.

Abstract: A variable inductor is disclosed. In accordance with some embodiments of the present disclosure, a variable inductor may comprise a single-turn conductor comprising a first inductor terminal, a second inductor terminal, a first base portion extending from the first inductor terminal to a first intersection location, a second base portion extending from the second inductor terminal to a second intersection location, and a switched portion extending from the first intersection location to the second intersection location, and a switch comprising a first conductive terminal coupled to the first intersection location and a second conductive terminal coupled to the second intersection location.

Abstract: Gangable inductive battery chargers with integrated inductive coils are provided. A gangable inductive battery charger has at least one power supply module and at least one inductive charging cup module. The power supply module and the inductive charging cup module are interlockingly connectable through rail and slot mechanical connectors and an electrical connector. The inductive charging cup module has one or more charging cups that are capable of receiving a battery. A primary inductive coil embedded in the inductive charging cup module transfers power from the power supply module to a battery received by one of the one or more charging cups. The battery contains a secondary inductive coil for receiving power from the embedded primary coil. Multiple power supply and inductive charging cup modules may be interlockingly connected as needed.

Abstract: In a cooling system used in cooling of a heater housing box, the present invention presents an apparatus for stabilizing power supply of heater housing box cooling apparatus capable of changing over a plurality of taps provided in the winding of a power transformer before the output voltage exceeds an allowable voltage range when turning on alternating-current power supply. For this purpose, first resistor 1 for elevating slowly the output voltage of the power transformer when turning on the alternating-current power supply is provided at the secondary side of the power transformer, direct-current voltage V1 rectified and smoothed from the output voltage is delayed by the charging time of a first capacitor, and an electronic controller for operating a tap changeover relay for automatically changing over the plurality of taps provided in the power transformer is started before the output voltage exceeds the allowable voltage range.

Abstract: A circuit substrate including a laminated layer, an embedded electronic device, at least a circuit structure, and a solder mask layer is provided. The embedded electronic device is disposed within the laminated layer. The circuit structure is disposed on a surface of the laminated layer and is connected between a reference plane and the embedded electronic device. In addition, the solder mask layer is disposed on the surface of the laminated layer and exposes a portion of the circuit structure. The circuit structure has a specific layout by which a circuit trace with an adjustable length can be formed by disconnecting or connecting the exposed portion of the circuit structure.

Abstract: An electronic device includes a first winding having a first port and a second port. The first winding formed in a first metal layer. A second winding has a third port and a fourth port. The second winding includes a plurality of segments formed in the first metal layer. The second plurality of winding segments are connected by a bridge formed in a second metal layer. The first and second ports of the first winding are connected to the inner-portion of the first winding.

Abstract: Disclosed herein is an inductor module including a coil section provided with an input terminal and an output terminal. At least one of the input terminal and the output terminal is composed of a plurality of terminals. The input terminal and the output terminal are connected at different positions. The connection of the plurality of terminals constituting the input terminal or the output terminal is switched so as to change the combination of the input terminal and the output terminal, obtaining different inductance values.

Abstract: On-chip integrated variable inductors, methods of making and tuning an on-chip integrated variable inductor, and design structures embodying a circuit containing the on-chip integrated variable inductor. The inductor generally includes a signal line configured to carry an electrical signal, a ground line positioned in proximity to the signal line, and at least one control unit electrically coupled with the ground line. The at least one control unit is configured to open and close switch a current path connecting the ground line with a ground potential so as to change an inductance of the signal line.

Abstract: The present invention provides a central frequency adjustment device and adjustable inductor layout; wherein, the central frequency adjustment device is applied in an inductor/capacitor tank (LC tank) for adjusting the central frequency of the LC tank. The device comprises a first inductor with a first end and a second end; a second inductor with one end coupled with the second end of the first inductor; and, a first trimmable wire connected to the first inductor in parallel and to the second inductor in series, which adjusts the central frequency by cutting off the first trimmable wire.

Abstract: An apparatus, system, method, and article for a multi-tap microelectromechanical inductor are described. The apparatus may include an inductor formed on a substrate, a switching mechanism contacting the inductor to vary inductance of said inductor; and a disconnect mechanism contacting the inductor to reduce parasitic effects of the inductor upon actuation of said switching mechanism. Other embodiments are described and claimed.

Abstract: A variable inductor includes a coil and an inductance trimming member disposed on an insulating substrate. The inductance trimming member is disposed outside of an area where the coil is located. By exposing the inductance trimming member to a laser beam, cross rail members of the inductance trimming member are trimmed one by one, thus varying the inductance.

Abstract: A transformer is provided along with a combination of bridging tap-changers to provide a wide range of selectable output voltages in discrete, relatively small voltage steps where the highest voltage is more than double the lowest output voltage. Relatively inexpensive, off-the-shelf, bridging tap-changers are utilized in conjunction with transformer winding schemes to provide a low winding loss ratio.

Abstract: A method is provided for the manufacture of precision electronic components such as resistors, inductors, and capacitors on a polymer or ceramic surface. The electronic components can be deposited and trimmed to precise or matched values without having precise depositions of all of the pre-patterned materials. Thin film electronic components are deposited on a surface, parameter values are measured or estimated, a correction offset file is generated, and the components are trimmed using adaptive lithography to a very close tolerance. A computer program can be used to enable the adjustment of electronic components by techniques such as changing the physical length of an inductor coil or resistor lead, or by changing a capacitor plate area.

Abstract: A switching device with a four-legged coil and specially designed plug-in locations on the device housing. The first type of plug-in location is connected to the first winding end and will only accept a first type shape-coded connecting terminal. The second type of plug-in location is connected to the second winding end and will only accept a second type shape-coded connecting terminal. This reliably prevents accidental short-circuits.

Abstract: A variable inductor includes a coil, a moveable contactor, and moveable magnetic material caused to move proximate the coil and simultaneously with the contactor. The contactor establishes first and second portions of the coil and, relative to the condition using no magnetic material, the inductance of the first portion is increased while the inductance of the second portion is substantially unchanged. Thus, over substantially all the tuning range, the first portion inductance is maintained greater than the second portion inductance.

Abstract: As part of a moveable carriage assembly, a plurality of trolley wheels are capable of being driven, in worm-gear fashion, along a coil which is rotatable about its axis. One end of the coil is conductive and the other end of the coil is preferably non-conductive. A further part of the traveling carriage assembly electrically interconnects a conductive trolley wheel with an electrical contact situated remote from one end of the coil. Multiple conductive wheels are electrically interconnected.

Abstract: A plurality of moveable contactors may travel along a rotating coil, one end of which is conductive and the other end of which is non-conductive. Two or more electrically interconnected moveable contactors effect a shorting across unused electrical turns and thereby affect unused coil portion resonance. For tuning conditions where very little of the coil is unused, the non-conductive coil portion serves as a sidetrack onto which one or more contactors can move and acts as a mechanical storage or memory for preserving relative positions between contactors.

Abstract: A device for controlling the heat generated by induction coils in a multiple induction heating coil furnace. Multiple induction coils provide parallel cylindrical passages having axial lengths and fixed diameters through which elongated workpieces are movable in the axial direction. The axial length of one induction coil is fixed while the other coils have variable lengths as a result of an arrangement for altering the distance between first and second ends of the induction coils. Sensors detect the temperatures of workpieces within each induction coil and a comparison of the detected temperature reveals the difference between the variable and fixed axial length induction coils. The axial length of the coils are shortened in the event that the detected temperature is greater than that of the workpiece in the fixed axial length coil, and conversely, lengthened in the event that the detected temperature is less than that of a workpiece in the fixed axial length coil.

Abstract: The method of and apparatus for changing the inductance of a high power air core coil through the process of selectively shorting out predetermined numbers of turns. The apparatus comprises a conductive belt which is positioned interior the coil whereby the problems of corona discharge from the winding contents are substantially reduced. Since the shorting conductor is a thin film of conductive material attached to a tape, the mass is very low and vibration forces applied to the unit have much less effect in producing interruptions of contact.