A Digital-to-Analog Converter (DAC) reconstructs a continuous electrical potential from discrete binary words using precision resistive networks. In a classic R-2R ladder topology, alternating series resistors of value R and shunt resistors of value 2R create successive current binary divisions by factors of two at each successive circuit node. High-speed electronic switches route these binary-weighted branch currents to a summing amplifier, producing an analog output voltage directly proportional to the numeric binary input.