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:
Jun. 19, 2007
Filed:
Sep. 19, 2005
Chyh-yih Chang, Taipei County, TW;
Kuo-ching Chen, Kaohsiung, TW;
Chyh-Yih Chang, Taipei County, TW;
Kuo-Ching Chen, Kaohsiung, TW;
Novatek Microelectronics Corp., Hsinchu, TW;
Abstract
A level shifter ESD protection circuit with power-on-sequence consideration used for receiving a first signal and outputting a second signal is provided. The level shifter circuit includes an inverter, a first switch, a second switch, a voltage level shifting circuit, a first ESD clamp and a second ESD clamp circuits. When the first power supply has been powered on and the second power supply is off, the first and second switches will remain off resulting from the power-off of the second power supply. Therefore, the second power source would not be affected by the first power supply because of passing through the ESD protection circuit.