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:
May. 05, 2009
Filed:
Jun. 01, 2007
Applicants:
Rei-fu Huang, Tainan Hsien, TW;
Shih-huang Huang, Hsin-Chu, TW;
Inventors:
Rei-Fu Huang, Tainan Hsien, TW;
Shih-huang Huang, Hsin-Chu, TW;
Assignee:
Mediatek Inc., Hsin-Chu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L 5/00 (2006.01); H03K 19/0175 (2006.01);
U.S. Cl.
CPC ...
Abstract
The disclosure relates to a voltage converter, converting a first signal of a first voltage to output a second signal of a second voltage. A level shifter receives the first signal to generate the second signal. An isolation circuit is coupled to the output of the level shifter, passing the second signal out. When the input of voltage converter is floated, the isolation circuit stops passing the second signal as the output, instead, the isolation circuit outputs a substitution signal having a predetermined voltage level irrelevant to the input of the level shifter.