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:
Feb. 24, 2009
Filed:
Mar. 19, 2007
Shuji Omae, Osaka, JP;
Shinichi Negi, Osaka, JP;
Kosuke Maeda, Osaka, JP;
Daihen Corporation, Osaka, JP;
Abstract
An impedance matching apparatus has: a storing portionfor previously storing, for plural positions which can be taken by a movable portion of a variable impedance element, allowable power values respectively corresponding to the plural positions of the movable portion; and an abnormality determining portionfor determining an allowable power value based on the present positions of the movable portion supplied from position detecting portionsand the allowable power values stored in the storing portion, for comparing the allowable power value with an input power value, and for determining that it is abnormal when the input power value is larger than the allowable power value. Accordingly, the calculation load during the matching operation can be reduced.