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:
May. 02, 2006
Filed:
Sep. 28, 2004
Atsuhiro Yamashita, Osaka, JP;
Atsuhiro Yamashita, Osaka, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A ramp voltage generating apparatus according to the present invention includes a ramp voltage generating circuit for generating a plurality of ramp voltages out of phase with each other from one ramp voltage, and a control circuit. The ramp voltage generating circuit includes a plurality of voltage generating circuit portions connected in parallel to a voltage input terminal. Each voltage generating circuit portion includes a voltage output terminal, a capacitor, an operational amplifier, a first switch, a second switch and a third switch. The control circuit turns on the third switches while shifting the time point of switching each of the third switches from off to on state, and the control circuit turns off the first switches and, also, turns on the second switches during the period including the fall time point of the ramp voltage input to the voltage input terminal.