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:
Apr. 22, 2014
Filed:
Nov. 09, 2012
Canon Kabushiki Kaisha, Tokyo, JP;
Naoki Umemura, Abiko, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A highly power-efficient switching power supply is realized. A switching power supply circuit of the present invention comprises: a pulse generation unit configured to generate a pulse for alternately opening and closing a first and a second switching elements; and a switching unit configured to input a voltage to the pulse generation unit in accordance with the detected power consumption level in the external load, wherein the pulse generation unit is configured so as to reduce the pulse width of the pulse that is generated if the voltage input from the switching unit is higher than a reference voltage, and to increase the pulse width of the pulse that is generated if the voltage input from the switching unit is lower than the reference voltage.