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:
Oct. 04, 2011
Filed:
Apr. 08, 2010
Applicants:
Yong-gu Kang, Gyeonggi-do, KR;
Choung-ki Song, Gyeonggi-do, KR;
Inventors:
Yong-Gu Kang, Gyeonggi-do, KR;
Choung-Ki Song, Gyeonggi-do, KR;
Assignee:
Hynix Semiconductor Inc., Gyeonggi-do, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A level shifter circuit includes a pull-up unit configured to pull up an output node to a second voltage level being higher than a first voltage level in response to an input signal swinging with an amplitude of the first voltage level, a pull-down unit configured to pull down the output node in response to the input signal, and a protection unit connected between the output node and the pull-down unit to prevent a voltage of the output node from being applied to the pull-down unit.