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:
Mar. 29, 2005
Filed:
Nov. 21, 2003
Masayoshi Kinoshita, Osaka, JP;
Shiro Sakiyama, Kyoto, JP;
Masayoshi Kinoshita, Osaka, JP;
Shiro Sakiyama, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A two-level supply voltage detection circuit includes two power supply detection circuits. One of the power supply detection circuits is provided on the high potential side, and the other is provided on the lower potential side. Each power supply detection circuit outputs a detection signal which is active when the supply voltage is equal to or higher than a reference value. The two-level supply voltage detection circuit outputs an OR logic value of the detection outputs of the power supply detection circuits. Furthermore, the power supply detection circuit on the low voltage side includes a detection operation control circuit. Only when a detection signal output from the power supply detection circuit on the high voltage side is active, the detection operation control circuit turns off the power supply detection circuit on the low voltage side in response to the active detection signal.