Patent ID: 7501971

Claim:
An apparatus comprising: a first circuit branch comprising first transistors coupled in series between first and second supply nodes; a second circuit branch coupled to the first circuit branch and comprising second transistors coupled in series between the first and second supply nodes, and a first resistive unit coupled in series with the second transistors, the first and second circuit branches to receive analog input information and to provide digital output information, the digital output information having output values based on a relationship between a voltage across the first resistive unit and a voltage difference between first and second components of the analog input information; and a circuit coupled to the first and second branches, the circuit comprising a second resistive unit and a node to receive a first voltage to generate a first current through the second resistive unit, and wherein the voltage across the first resistive unit is a function of the first voltage and a ratio of a resistance value of the first resistive unit and a resistance value of the second resistive unit.