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:
Nov. 09, 2010
Filed:
Jun. 18, 2007
Koji Yoshida, Nara, JP;
Hiroyuki Handa, Osaka, JP;
Mitsuhiro Matsuo, Osaka, JP;
Masafumi Nakamura, Mie, JP;
Takaharu Murakami, Osaka, JP;
Koji Yoshida, Nara, JP;
Hiroyuki Handa, Osaka, JP;
Mitsuhiro Matsuo, Osaka, JP;
Masafumi Nakamura, Mie, JP;
Takaharu Murakami, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The power supply unit has a sample-and-hold circuit that samples a voltage supplied from a power source to a load according to a sample timing signal and holds the voltage as an output set value for the DC/DC converter. The unit supplies a load with an output from the DC/DC converter controlled so that an output voltage of a power source becomes an output set value of the DC/DC converter when the voltage of the power source drops. Since a voltage corresponding to the voltage of the power source before the voltage drop is set to the output set value of the DC/DC converter, a stable power supply unit is obtained in which the difference is always small between the voltage of the power source in normal times and the output voltage from the DC/DC converter when the voltage of the power source temporarily fluctuates.