Patent ID: 7710164

Claim:
An integrated circuit comprising: a first transistor used as a switch and having a first terminal coupled to receive an input voltage, a gate, and a second terminal coupled to provide an output voltage when the first transistor is conducting and a high impedance when the first transistor is nonconducting; a second transistor coupled between the gate of the first transistor and a first node, wherein when the first transistor is conducting, the second transistor is nonconducting and the first node and a gate of the second transistor are coupled to the input voltage, and wherein when the first transistor is nonconducting, the second transistor is conducing and the gate of the first transistor and the first node are coupled to a first voltage; and a capacitor having a first terminal and a second terminal, wherein when the first transistor is conducting, the second terminal of the capacitor provides a voltage approximately equal to a second voltage plus the input voltage to the gate of the first transistor.