Variable inductor device

Details Variable inductor device Variable inductor device

1998-11-06

2000-09-05

Donovan, Lincoln

Inductor devices

Coil or coil turn supports or spacers

Printed circuit-type coil

336232, 257531, H01F 500

Patent

active

061149381

ABSTRACT:
A variable inductor device has at least two coils. The at least two coils are disposed on an insulating substrate with an inductance adjusting element located therebetween. The inductance adjusting element is electrically connected at one end to a tap center electrode. The at least two coils are electrically connected to each other via the inductance adjusting element. The inductance adjusting element is grooved and horizontal paths of the inductance adjusting element are sequentially disconnected one by one by, for example, a laser beam. The inductances are thus varied. It is therefore possible to provide a variable inductor device in which the area required for mounting the device on a printed circuit board is decreased and the inductances are stably adjusted while keeping the inductances balanced.

REFERENCES:
patent: 4573101 (1986-02-01), Takeno
patent: 4888568 (1989-12-01), Kawaguchi
patent: 5015975 (1991-05-01), Okubo
patent: 5034710 (1991-07-01), Kawaguchi
patent: 5532656 (1996-07-01), Yoshimura
patent: 5572180 (1996-11-01), Huang et al.
patent: 5578981 (1996-11-01), Tokuda
patent: 5699025 (1997-12-01), Kanoh et al.

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