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:
May. 13, 2008
Filed:
Aug. 26, 2005
Applicants:
Young-jae Lee, Daejon, KR;
Cheon-soo Kim, Daejon, KR;
Hyun-kyu Yu, Daejon, KR;
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H01F 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
There is provided a transformer for varying an inductance value, which adjusts a tuning range of the inductance without decrease of the inductor's capability by selectively connecting switches to inductors and controls an amount of magnetic flux. And the transformer consists of multiple inductors formed on a semiconductor substrate, which including N number of metal lines, N number of ports made by twisting the metal lines in the form of a symmetric circuit, wherein a certain number of ports among the N number of ports, which are connected to switch elements.