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:
Feb. 04, 2003
Filed:
Jun. 02, 2000
Koichi Nojima, Tokyo, JP;
Kiyokazu Nagahara, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
When a relay ( ) is controlled, an AC voltage ( ) may be rectified in a full-wave rectification fashion. In a voltage-doubler rectification fashion, and a rectified output supplied to a main converter ( ) or the AC voltage ( ) may be rectified in a half-wave rectification fashion, and a rectified output supplied to a standby converter ( ). A just detection circuit ( ) detects a rectified voltage of the standby side, and a detection circuit ( ) may detect a rectified voltage supplied to the main converter ( ). The first and second voltage detection circuits ( ) and ( ) control operations of relay drive circuits ( D and D) based on both detection signals so that any one of two relay contacts ( and ) may be turned on. Since a voltage of the rectified output supplied to the main converter ( ) may be detected and its detection signal also may be used for control, a detection timing can be made fast so that, even when the voltage of the commercially-available voltage is fluctuated suddenly, the rectification systems can be switched immediately.