| 摘要 |
ELECTRICALLY CONTROLLABLE INDUCTIVE DEVICE An inductive device is provided for universal use in desired electric/electronic switching circuits, where the inductivity L is independent of the signal, is constant, is electrically controllable and can be varied as desired over a wide range. The device element is constructed of two ferromagnetic cores 11, 12 which are magnetically independent from each other and which are of closely identical construction and closed in themselves. The ferromagnetic cores carry individually partial windings of an inductive winding and jointly a control winding 17. The sense of the windings is such that the magnetic fields generated by the currents of the windings attenuate mutually in one core while they strengthen each other in a second core. The device 10 is connected with its induction winding 15 to a control switching circuit and, respectively, forms with its windings part one of these switching circuits. Variation of a current I flowing through a control winding controls the switching circuit to be controlled, by the value of the inductivity for the controlled switching circuit. Different output signal levels of at least a ratio of about 1:100 are available. |
