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:
Mar. 08, 2011
Filed:
Jul. 02, 2008
Jun Ishikawa, Tokyo, JP;
Yasuyuki Hattori, Tokyo, JP;
Akira Sato, Tokyo, JP;
Hiromichi Tokuhiro, Tokyo, JP;
Masashi Tanabe, Gunma, JP;
Jun Ishikawa, Tokyo, JP;
Yasuyuki Hattori, Tokyo, JP;
Akira Sato, Tokyo, JP;
Hiromichi Tokuhiro, Tokyo, JP;
Masashi Tanabe, Gunma, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Sanyo Semiconductor Co., Ltd., Gunma, JP;
Abstract
A digital waveform generating circuit having a DC voltage as an input and generating a sinusoidal digital signal, an active filter extracting low-frequency components from the sinusoidal digital signal generated in the digital waveform generating circuit, and a high-voltage control circuit generating a high-voltage drive signal using the sinusoidal digital signal after passing through the active filter are provided. A smooth waveform without steep voltage changes is generated.