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:
Oct. 13, 2009
Filed:
Mar. 21, 2005
Alin Theodor Iacob, Sunnyvale, CA (US);
Alin Theodor Iacob, Sunnyvale, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A power circuit generating a non-isolating low voltage power supply using a capacitive AC voltage drop in standby. Specifically, the power circuit includes an AC connector that generates a first AC input and a second AC input that are opposite in phase. The power circuit also includes first and second diode bridge rectifier circuits that are coupled to the first AC input, the second AC input, and a ground. A first capacitor drops a voltage of the first AC input, and a second capacitor drops a voltage of the second AC input. The first diode bridge rectifier circuit provides a high voltage power signal to a load. The second diode bridge rectifier circuit provides a low voltage power signal to a microcontroller.