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. 13, 2010
Filed:
May. 21, 2009
Applicant:
Wei-ming Ku, Taipei County, TW;
Inventor:
Wei-Ming Ku, Taipei County, TW;
Assignee:
eMemory Technology Inc., Science Park, Hsinchu, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 19/0175 (2006.01); H03K 19/094 (2006.01);
U.S. Cl.
CPC ...
Abstract
A level shift circuit includes a high voltage circuit, a clamp circuit, an input circuit, and a bypass circuit. The high voltage circuit is electrically connected to a high voltage terminal. The clamp circuit can prevent the transistors of the high voltage circuit from high voltage stress when a voltage level of the high voltage terminal is greater than a voltage level of a voltage source. The bypass circuit is used to bypass the clamp circuit when a voltage level of the high voltage terminal is smaller than a voltage level of transistor breakdown voltages.