Patent ID: 6975155

Claim:
A level shifting device, comprising: a first transistor having its gate connected to an input signal, its source connected to a voltage node at a lower voltage value, and its drain connected to an output signal; a second transistor having its gate connected to an inverted version of the input signal, its source connected to the voltage node at the lower voltage value, and its drain connected to an inverted version of the output signal; a third transistor having its gate connected to the drain of the second transistor, and its drain connected to the drain of the first transistor; a fourth transistor having its gate connected to the drain of the first transistor, its drain connected to the drain of the second transistor, and its source connected to a voltage supply at a first upper voltage value; a fifth transistor having its gate connected to the input signal, its source connected to the voltage supply at the first upper voltage value, and its drain connected to the source of the third transistor; a sixth transistor connected between the fourth transistor and the voltage supply at the first upper voltage value, the inverted version of the input signal being applied to the gate of the sixth transistor; and a seventh transistor connected in parallel with the third transistor between the fifth transistor and the first transistor, the inverted version of the input signal being applied to the gate of the seventh transistor; wherein the input signal swings between a second upper voltage value and the lower voltage value and the output signal swings between the first upper voltage value and the lower voltage value.