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:
Sep. 21, 2010
Filed:
Mar. 27, 2008
Yu-tzu Chang, Miaoli, TW;
Yu-Tzu Chang, Miaoli, TW;
Taiwan Semiconductor Manufacturing Co., Ltd., Hsin-Chu, TW;
Abstract
A voltage level shifter includes a first switch module having a first transistor and a second transistor, each transistor having a drain, a gate, and a source, wherein the drains of the first and the second transistors are coupled to a first voltage terminal. The voltage level shifter further includes a second switch module coupled between the first switch module and a second voltage terminal, the second switch module including at least six transistors coupled each other, wherein each transistor of the second switch module having a gate for receiving a GATE signal, a GATEb signal, a CORE_INPUT signal, a CORE_INPUTb signal, an IO_INPUT signal, or an IO_INPUTb signal, respectively, wherein the second switch module is designed to produce an output signal at an output node in response to the IO_INPUTb signal and the IO_INPUT signal respectively, irrespective of the CORE_INPUTb signal and the CORE_INPUT signal when the GATE signal is logic low, thereby reducing a leakage current flowing from the first voltage terminal to the second voltage terminal.