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:
Jan. 05, 2016
Filed:
Feb. 27, 2015
Shimadzu Corporation, Kyoto-shi, Kyoto, JP;
Toshiya Habu, Kyoto, JP;
SHIMADZU CORPORATION, Kyoto, JP;
Abstract
A starter is provided for a self-oscillating radio frequency oscillation circuit for high-power applications used for plasma generation in an ICP emission spectrometer or for other purposes. A secondary winding of a starting transformer is arranged in an LC resonance circuit including an induction coil, capacitor and other elements. A starter, e.g. a Clapp oscillator circuit, is connected to a primary winding magnetically coupled with the secondary winding. A radio-frequency current is induced in the LC resonance circuit by energizing the starter for a certain period of time in a starting phase. As a result, electric current flows through the secondary windings in a full-bridge drive circuit which are magnetically coupled with primary windings, whereby voltage is developed between the gate and source of MOSFETs, causing these MOSFETs to begin an ON/OFF operation, whereby the self-oscillation is started.