Patent ID: 7646321
Filing Date: 2010-01-12
Classification: H03M

Abstract:
1. A digital/analog converter comprising: a voltage dividing unit that includes a plurality of voltage dividing elements and divides a reference power supply voltage by voltage division; a first decoder that selects a plurality of voltages among the voltages divided by the voltage dividing unit; a first voltage output unit that is connected to nodes among adjacent voltage dividing elements of the voltage dividing unit and the first decoder, and outputs the plurality of voltages selected by the first decoder; a second decoder that selects any one of the plurality of voltages output from the first voltage output unit; and a second voltage output unit that is connected to the first voltage output unit and the second decoder, and outputs the voltage selected by the second decoder, wherein the first voltage output unit includes a plurality of voltage selecting units each having a plurality of switching elements that are connected to the nodes of the voltage dividing unit, and wherein each of the voltage selecting units includes the switching elements which are connected to one another through the first decoder and of which the number is a multiple of a predetermined number.