| 摘要 |
PCT No. PCT/CH86/00119 Sec. 371 Date Jun. 29, 1987 Sec. 102(e) Date Jun. 29, 1987 PCT Filed Aug. 15, 1986 PCT Pub. No. WO87/01505 PCT Pub. Date Mar. 12, 1987.An inductive component for universal use in any electrical/electronic circuits, whose coefficient of self-induction (L) is independent of the signal, is constant, electrically controllable and can be varied significantly. The component (10) comprises two mutually independent, identical ring-shaped and self-contained ferro-magnetic cores (11, 12) which individually carry the partial windings (15.1, 15.2) of an induction winding (15) and jointly carry a control winding (17). The direction of coiling of the windings (15.1, 15.2, 17) is such that the magnetic fields produced by currents through the windings are mutually weakened, but in the other core (12) they are reinforced. The component (10) is connected via its induction winding (15) to a controlled circuit (25), and via its control winding (17) to a controlling circuit (27), or forms with its windings (15, 17) an element of this circuit (25, 27). By varying the current (I) via the control winding (17) the controlling circuit (27) controls the value of the coefficient of self-induction (L) for the controlled circuit (25 ), a variation range of at least 1:100 being provided. |
