Patent ID: 6344815
Filing Date: 2002-02-05
Classification: H03M

Abstract:
A D/A converter that converts an input digital data into an analog voltage signal, comprising:a decoder that decodes the digital data; a first resistance group which is made up of a plurality of first resistances connected in series with each other via a plurality of first taps, that divides a voltage generated between a first power source and a mid node, and that outputs divided voltages from each of said first taps; a plurality of first transistors respectively coupled to each of said first taps, that supply the divided voltages from said first taps to a voltage output node in accordance with decode results of said decoder; a second resistance group which is made up of a plurality of second resistances connected in series with each other via a plurality of second taps, that divides a voltage generated between a second power source and said mid node, and that outputs divided voltages from each of said second taps; a plurality of second transistors respectively coupled to each of said second taps, that supply the divided voltages from said second taps to the voltage output node in accordance with the decode results of said decoder; and a fixed voltage supply that supplies the fixed voltage to said mid node.