Patent ID: 7522081

Claim:
A digital-to-analog converter for selecting one gamma reference voltage out of a plurality of gamma reference voltages based on an N-bit digital data signal so as to output an output voltage, the plurality of gamma reference voltages being divided into a plurality of sets of gamma reference voltages, the digital-to-analog converter comprising: a pre-decoder configured to decode an N1-bit sub-signal of the N-bit digital data signal for generating a plurality of control signals and a plurality of complementary control signals; a plurality of ROM decoders, each of the plurality of ROM decoders coupled to the pre-decoder for selecting one gamma reference voltage out of one corresponding set of gamma reference voltages based on the control signals, the complementary control signals, an N2-bit sub-signal of the N-bit digital signal, and a complement of the N2-bit sub-signal; and a binary decoder coupled to the plurality of ROM decoders for selecting one of the gamma reference voltages selected by the plurality of ROM decoders based on an N3-bit sub-signal of the N-bit digital signal and a complement of the N3-bit sub-signal so as to output the output voltage.