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. 05, 2013
Filed:
Sep. 04, 2007
Hiroshi Yaguma, Kyoto, JP;
Hiromitsu Nakaoka, Kyoto, JP;
Hiroshi Yaguma, Kyoto, JP;
Hiromitsu Nakaoka, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A power supply apparatus of the present invention comprises: a constant voltage generation section (first DAC (), second DAC (), resistor (R), resistor (R)) that generates a positive constant voltage (Va); a pulse voltage generation section (pulse oscillator (), amplifier ()) that generates a positive pulse voltage (Vb); a capacitor (C) of which one end is connected to the output terminal of the pulse voltage generation section; and a diode (D) of which an anode is connected to the other end of the capacitor (C), and of which a cathode is connected to the output terminal of the constant voltage generation section. A positive-negative bipolar pulse voltage (Vc) is outputted from the other end of the capacitor (C). Thus, it is possible to generate a positive-negative bipolar pulse voltage with a simple and small-scale circuit configuration.