Patent ID: 6448918
Filing Date: 2002-09-10
Classification: H03M

Abstract:
A digital-to-analog converter, characterized by comprising:a multiplying unit for performing a plurality of multiplying process using plural multiplicators on plural pieces of digital data inputted at a predetermined intervals; a plurality of step function generation unit for generating step function corresponding to each of the plural pieces of digital data using plural of multiplication result obtained by the multiplying unit synchronized with an input timing of each of the plural pieces of digital data; an adding unit for performing a process of adding up values of the step function generated by the plurality of step function generation unit; a stepwise voltage waveform generation unit for generating a stepwise analog voltage corresponding to the digital data obtained by the adding unit; and an integrating unit for performing analog integration plural times on the analog voltage generated by said stepwise voltage waveform generation unit, whereby a final analog signal output is produced by said integrating unit in the absence of passing an output of said integrating unit through a low pass filter.