發明人

王朝欽教授

系所

電機系

專利名稱

I/O buffer with twice the supply voltage tolerance using normal supply voltage devices

專利國別

美國

專利證書號

US 7,868,659

公告日期

2014/1/15

專利摘要

The invention relates to an I/O buffer with twice the supply voltage tolerance using normal supply voltage devices. The I/O buffer of the invention includes a driver, a first level converter, a gate-controlled circuit and a dynamic source output stage. Signals of the I/O buffer are classified into a first voltage range and a second voltage range. The first voltage range is zero to the normal supply voltage, and the second voltage range is the normal supply voltage to twice the supply voltage. Therefore, the voltage between any two terminals of any of the transistors in the I/O buffer does not exceed the normal supply voltage so that the I/O buffer of the invention can transmit and receive signals with a voltage swing twice as high as the normal power supply voltage using normal supply voltage devices and without gate-oxide reliability problems.

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