Patent ID: 7750900
Filing Date: 2010-07-06
Classification: G09G,H03M

Abstract:
1. A digital-to-analog converter comprising: a reference voltage generating circuit for generating and outputting a plurality of reference voltages having voltage values that differ from one another; a first logic circuit for outputting result of a logical operation on a first bit group composed of a plurality of bits comprising either even-numbered bits or odd-numbered bits of an input digital data signal composed of a plurality of bits; a second logic circuit for outputting result of a logical operation on a second bit group composed of a plurality of bits comprising the other of the even-numbered bits or odd-numbered bits of the input digital data signal composed of the plurality of bits; a switch group circuit for receiving the plurality of reference voltages output from said reference voltage generating circuit and respective outputs from said first and second logic circuits, and from among the plurality of reference voltages received, selecting a first voltage in accordance with an output of said first logic circuits, and selecting a second voltage in accordance with an output of said second logic circuit, said switch group circuit having first and second terminals and supplying the first and second voltages selected to the first and second terminals, respectively; an amplifier circuit for receiving the first and second voltages at first and second terminals, respectively and applying a predetermined operation to the first and second received voltages, respectively to output an output voltage that is the result of the operation from an output terminal.