Patent ID: 7375670

Claim:
A digital-to-analog converter (DAC), for converting an input word into dual output voltages, wherein the input word comprises a least significant bit (LSB) and remaining bits, the DAC comprising: an R-string DAC section for providing an nth and (n+2)th voltage levels according to the remaining bits; and a selecting section, comprising: a first multiplexer, coupled to the R-string DAC section to provide a first output voltage according to a panel polarity signal; and a second multiplexer, coupled to the R-string DAC section to provide a second output voltage according to the LSB bit of the input word, wherein the first multiplexer selects one of the nth and (n+2)th voltage levels to be the first output voltage, and the second multiplexer selects one of the nth and (n+2)th voltage levels to be the second output voltage.