The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 2000
Filed:
Nov. 06, 1998
Naoki Iida, Sabae, JP;
Kazuyoshi Uchiyama, Fukui-ken, JP;
Katsuji Matsuta, Sabae, JP;
Masahiko Kawaguchi, Takefu, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
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.