Patent ID: 8791724
Filing Date: 2014-07-29
Classification: G11C,H03K

Abstract:
1. A post driver implemented using core devices adapted to operate over a core voltage range between a high and a low voltage level, the post driver comprising: an output connection for providing output voltages within an I/O voltage range defined between a high voltage and a low voltage, the I/O voltage range being greater than said core voltage range; a first power connection adapted to operate at said high voltage of said I/O voltage range; a second power connection adapted to operate at said low voltage of said I/O voltage range; a first pair of transistors including a first and a second transistor, the transistors being core devices connected in cascade between said first power connection and said output connection and connected to each other at a first intermediate node; a second pair of transistors including a third and fourth transistor, the transistors being core devices connected in cascade between said output connection and said second power connection and connected to each other at a second intermediate node; and a voltage clamping element connecting said first and second intermediate nodes and having a threshold voltage greater than the difference between said I/O voltage range and said core voltage range.