Patent ID: 7446565

Claim:
A circuit connected between a supply voltage and ground that operates upon an input signal to generate an output signal comprising: an input node; an output node; a signal path disposed between the input node and the output node, whereby the input node, the output node and the signal path are part of a common bus; a pass transistor disposed within the signal path; an impedance control circuit coupled to the input node and which controls the pass transistor; a comparator that compares a voltage on the output node to a reference voltage, and produces a comparator output signal on a comparator output line; a pull-down transistor coupled between the input node and the ground, and being controlled by the comparator output signal on the comparator output line; a switch coupled to the supply voltage, and controlled by the comparator signal; and wherein: the pass transistor, and the impedance control circuit together operate to cause the input signal having one signal mode with a high and a low state on the input node to be level shifted to the output signal having another signal mode with a respective high and low state on the output node; and the comparator, the pull-down transistor and the switch together operate to cause dynamic pull-up and pull-down of the level shifted output signal.