Abstract:
A double-tuned circuit includes a primary side tuned circuit 10 having a first air-cored coil (L2) and a secondary side tuned circuit (11) having a second air-cored coil (L3). The first air-cored coil (L2) and the second air-cored coil (L3) are opposed to each other so that one opening end of the first air-cored coil (L2) and one opening end of the second air-cored coil (L3) are capable of being coupled to each other on a coil mounting surface. The coil mounting surface is provided with a first conductive pattern (12) formed adjacent to the first air-cored coil (L2) in a direction perpendicular to an arrangement direction of the first and second air-cored coils (L2, L3), and both ends of first conductive pattern (12) are connected to a ground.
Abstract:
A strain-resistant electrical connection and a method of making the same is provided. An antenna (36, 38) or other conductive lead is connected to a circuit (32) in a manner that makes the connection more resistant to mechanical stresses such as movement or rotation of the antenna (36, 38) or conductive lead relative to the circuit (32). The antenna (36, 38) or conductive lead is at least partially coiled to provide additional ability to withstand mechanical stresses. The antenna (36, 38) or conductive lead may be encase along with is connected circuit in an elastomeric material.
Abstract:
The invention relates to a contact system comprising a spring and an accordingly associated printed circuit board surface, with which the spring is in contact. The printed circuit board surface to be contacted is a carbon printed circuit board surface. Increased contact resistance between the spring and the carbon printed circuit board surface, which is associated with the contact system according to the invention, is furthermore compensated for by electric and/or electronic means. The spring that is used is provided with a spring force adapted to the carbon printed circuit surface.
Abstract:
A structure of a vibrator to increase reliability in an electrical connection between power supply terminals of and circuit board electrodes of the vibrator, and to improve mounting efficiency of the vibrator on a circuit board. In the structure, the terminals are constructed from twisted coil springs, and contact portions of the terminals, which portions are in contact with the electrodes, are made in a winding form. The twisted coil springs each are wound around a pivot pin, and steps as clearance for the contact portions and surface portions to which the contact portions are opposed face to face are provided. However, alternatively to the steps and surface portions above, any of the following structures can be adapted: providing a partition plate between two power supply terminals, or surrounding spaces, in which the contact portions can elastically deform, by insulative box members, or extending the twisted coil spring portions to the contact portions asymmetrically in a positive and a negative electrode so that, when the power supply terminals are elastically deformed, each of the contact portions to be deformed more outward than each of the coil spring portions.
Abstract:
Multiple small conductive and flexible hollow rings (10), each of which is made from a pliable material, provide a flexible connection medium for use between a substrate (23, 80, 82) and a microelectronic device package (88). Each ring is formed to have at least one protuberance (20) on the a ring's exterior surface. The protuberance has an apex (22) or point, which when placed against a surface, will scrub or scrape the surface as the ring is compressed by a force acting on the ring radially. By scrubbing a contact surface with the apex, surface contaminants and layered material that might interfere with electrical signals can be removed.
Abstract:
A strain-resistant electrical connection and a method of making the same is provided. A wire or other conductive lead (38) is connected to a circuit in a manner that makes the connection more resistant to mechanical stresses such as movement or rotation of the lead relative to the circuit. A material is configured around the lead and near the point of connection to the circuit so as to create a region of decreasing flexibility or graduated stiffness near the point of connection. In certain embodiments, the lead may also be coiled or otherwise shaped to provide additional ability to withstand mechanical stresses. In other embodiments, additional elements may be provided to assist in controlling the stiffness near the connection point.
Abstract:
In an oscillator circuit employing a pattern coil on a printed-wiring board as a resonator circuit, in order to satisfactorily adjust dispersion in oscillation frequencies, an air-core coil wound by more than half a turn and less than one turn is provided so as to be connected to the pattern coil in parallel and planted on the printed-wiring board, and the oscillation frequency is adjusted by adjusting the angle of the air-core coil relative to the printed-wiring board.