Abstract: The present invention is directed at an inductor which is capable of providing a variable inductance. The variable inductor is typically mounted/stored on an integrated circuit chip to provide continuous or multiple variable inductor values for wireless applications and the like.

Abstract: A three-dimension inductor structure formed in a conventional integrated circuit technology has a direction of magnetic field perpendicular to the normal direction of the substrate of an applied integrated circuit. Due to the direction of the magnetic field, the electromagnetic interference induced by the three-dimension inductor structure affects other components in the same integrated circuit slightly. The three-dimension inductor structure includes an N-turn coil. Each turn coil in the N-turn coil includes a first-level metal line, a second-level metal line and third-level metal line. The three levels of metal lines are separated from one another by isolating layers. Two nearby levels of metal lines are connected through via plugs in the isolating layers between them. The integral coil is accomplished by connecting the second-level metal line of the Nth turn coil to the third-level metal line of the (N+1)th turn coil.

Abstract: The invention concerns an inductance device formed on the basis of an asymmetrical line. This inductance device includes a plane conductor, preferably cylindrical, a linear conductor extending along and close to the plane conductor and having one end short-circuited with the plane conductor. Positioning devices make it possible to keep the linear conductor in a determined position in relation to the plane conductor. The inductance device is particularly used for the manufacture of power inductances for short waves.

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: A variable inductance includes a coil and a moveable contactor which maintains continuous contact with the coil. An electrical connection, which is moveable along with the moveable contactor and away from a first end of the coil, connects the moveable contactor with further contact means positioned remote from the first end of the coil.

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: In a variable inductor of the type comprising a helical winding, the pressure exerted by the slider on the conductor of the winding decreases when the slider undergoes a high-speed displacement. A separating device is associated with the slider and, under the action of the centrifugal force produced at the time of a high-speed displacement of the slider, tends to move said slider away from its point of application on the conductor and therefore to reduce the pressure at the point of contact between the slider and the conductor. Wear resulting from displacements of the slider is thus minimized.

Abstract: A compact arrangement having concentric loading element and coupling element with the latter forming a bearing support for a revolvable member mounting the former.