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:
Jul. 20, 2010
Filed:
Aug. 24, 2007
Yasushige Ogawa, Kasugai, JP;
Yasushige Ogawa, Kasugai, JP;
Fujitsu Semiconductor Limited, Yokohama, JP;
Abstract
A level shift circuit determining a logic value while preventing load capacitance from increasing. A voltage detector detects the states of first and second voltages and generates first and second detection signals. A first logic unit generates a first control signal having a level that is in accordance with an input signal or a level of a third voltage in response to the first detection signal. A second logic unit generates a second control signal having a level that is in accordance with the first control signal or a level of the second voltage in response to the second detection signal. A level converter generates an output signal based on the first and second control signals and clamps the output signal at a fixed level when an abnormality occurs in the first voltage.