Patent ID: 8446784

Claim:
A method of level shifting a signal in a circuit comprising a first transistor coupled between a first voltage source and a first node and having a control gate coupled to an output node, a second transistor coupled in parallel with the first transistor between the first voltage source and the first node, a third transistor coupled between the first node and the output node, and a fourth transistor coupled between a second node and the output node and having a control gate coupled to a second voltage source, the method comprising: generating a first input signal having a logic level and applying the first input signal to a control gate of the second transistor to deactivate the second transistor when the fourth transistor is activated and to activate the second transistor when the fourth transistor is deactivated; and generating a second input signal having a logic level and applying the second input signal to a control gate of the third transistor to activate the third transistor when the second transistor is activated and to deactivate the third transistor when the second transistor is deactivated.