Patent ID: 8022729

Claim:
A signal driver circuit to generate an output signal at an output node having a logic level according to an input signal, the signal driver circuit comprising: a first switch coupled to the output node and a reference node, the first switch configured to electrically couple the output node to the reference node in response to the input signal having a first logic level and decouple the output node from the reference node in response to the input signal having a second logic level; a second switch coupled to the output node and an output voltage node, the second switch configured to electrically couple the output node to the output voltage node in response to the input signal having the second logic level and decouple the output node from the output voltage node in response to the input signal having a first logic level; and a voltage controlled impedance circuit coupled to the output voltage node and a voltage supply, the voltage controlled impedance configured to provide an output voltage to the output voltage node having a constant magnitude that is less than a magnitude of the voltage supply, the output voltage being set in accordance with a bias voltage, and the bias voltage comprising a voltage equal to the sum of a voltage representing a threshold voltage of the voltage controlled impedance circuit and a high logic level voltage.