Various embodiments disclose apparatus, systems, and methods operating with a first circuit branch with transistors coupled in series between first and second supply nodes, and a second circuit branch with second transistors coupled in series between the first and second supply nodes. The second circuit branch may include a resistive unit coupled in series with the second transistors. The first and second circuit branches may receive analog information and to provide digital output information. The digital output information may include 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. Other embodiments disclose additional apparatus, systems, and methods.
