Patent ID: 8866658

Claim:
A resistor string digital-to-analog converter comprising: (A) an input terminal receiving a digital input signal in digital code; (B) an output terminal revealing an analog output signal in analog voltage; (C) a plurality of voltage acquisition nodes; (D) a plurality of resistors being connected in series via the voltage acquisition nodes, wherein the voltage acquisition nodes include (E) a first pair of nodes which are adjacent to each other through one or more of the voltage acquisition nodes; (F) a second pair of nodes revealing a second pair of analog voltages; (G) a high-order voltage-acquisition circuit providing conduction between the first pair of nodes and the second pair of nodes, respectively, in accordance with the digital input signal; and (H) a low-order converter generating the analog output signal, which is obtained by interpolating between one and the other of the second pair of analog voltages in accordance with the digital input signal.