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. 12, 2010
Filed:
Sep. 26, 2006
Hitoshi Miyashita, Tokyo, JP;
Kenji Sugiura, Tokyo, JP;
Hitoshi Miyashita, Tokyo, JP;
Kenji Sugiura, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
This patent specification describes a power adapter which includes a first amplifier configured to amplify a voltage difference between a voltage proportional to an output voltage of a switching regulator and a first reference voltage, a current detector configured to detect a current proportional to an output current of the switching regulator, a second amplifier configured to amplify an output signal from the current detector, a first converter configured to convert an output voltage of the first amplifier to a first current signal, a second converter configured to convert an output voltage of the second amplifier to a second current signal, an oscillator configured to oscillate with rectangular pulses and a controller configured to modulate an oscillation signal of the oscillator in accordance with the first and second current signals output from the first and second converters.