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:
Jun. 12, 2012
Filed:
Sep. 15, 2009
Minoru Sudou, Austin, TX (US);
Minoru Sudou, Austin, TX (US);
Seiko Instruments Inc., Chiba, JP;
Abstract
Provided is a voltage regulator capable of securely preventing a reverse current from an output terminal () with lower current consumption, irrespective of magnitude of a voltage of a VDD terminal (). Such a configuration is adopted that the voltage of the VDD terminal () and a voltage of the output terminal () of the voltage regulator are compared with each other with the use of a voltage generated between a transistor and a constant current circuit, to thereby reduce current consumption of a backup battery. Besides, such a configuration is also adopted that a gate of an output transistor is connected with the output terminal () based on an output of a comparator circuit, to thereby prevent the reverse current securely.