Patent ID: 7239191

Claim:
A level shifting device comprising: a first input buffer configured to receive a first input signal swinging between a first level and a second level to output a first output signal swinging between the first level and a third level greater than the second level, and configured to increase a rising speed of the first output signal or a falling speed of the first output signal in response to a second positive feed-back signal; a second input buffer configured to receive a second input signal having a substantially inverted phase with respect to the first input signal to output a second output signal having substantially inverted phase with respect to the first output signal, and configured to increase a rising speed of the second output signal or a falling speed of the second output signal in response to a first positive feed-back signal; and a latch circuit configured to receive the first and second output signals from the first and second input buffers, respectively, to latch the first and second output signals, and configured to output the first and second output signals as the first and second positive feed-back signals to the second and first input buffers, respectively.