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:
Aug. 24, 2021
Filed:
Dec. 20, 2019
Daihen Corporation, Osaka, JP;
Tatsuya Morii, Osaka, JP;
DAIHEN Corporation, Osaka, JP;
Abstract
An impedance matching device includes: a variable capacitor in which a plurality of first capacitance elements or a plurality of second capacitance elements are connected in parallel; a calculation unit that calculates an impedance or a reflection coefficient on the load side using information regarding the impedance acquired from the outside; and a control unit that determines an ON/OFF state to be taken by each of semiconductor switches included in the variable capacitor using the impedance or the reflection coefficient calculated by the calculation unit and turns on or off the semiconductor switches included in the first or second capacitance element based on the determined state. The control unit cyclically switches semiconductor switches to be turned on or off in a predetermined order.