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. 19, 2013
Filed:
Sep. 10, 2010
Chiaki Dono, Tokyo, JP;
Koji Kuroki, Tokyo, JP;
Chiaki Dono, Tokyo, JP;
Koji Kuroki, Tokyo, JP;
Elpida Memory, Inc., Tokyo, JP;
Abstract
A level shift circuit includes: a pair of first and second P-channel transistors which are connected in a flip-flop manner and whose sources connected to a first power supply line; a pair of first and second N-channel transistors with the first N-channel transistor provided between the first P-channel transistor and a second power supply line and the second N-channel transistor provided between the second P-channel transistor and the second power supply line, in which input signals complementary to each other are inputted to their gates; and a current supply circuit provided between the first power supply line and a drain of the first N-channel transistor and between the first power supply line and a drain of the second N-channel transistor, respectively. The current supply circuit includes third and fourth N-channel transistors with their sources connected to drains of the first and second N-channel transistors and third and fourth P-channel transistors serving as current limiting elements with their one ends connected to the first power supply line and the other ends connected to drains of the third and fourth P-channel transistors.