| 摘要 |
PURPOSE: A digital-analog converter is provided which minimizes differential non-linearity error and integral non-linearity error. CONSTITUTION: A current segment type digital-analog converter includes a decoder, a selection control circuit, a current source circuit and a current compensation control circuit. The selection control circuit(110) generates signals for selecting current sources according to the output signal of the decoder. A current cell array(120) is configured of LSB binary current cells, MSB segment current cells and switch paris corresponding to the current cells. Odd-numbered switches(S1,S3,S5,S9,Sn-1) among the switch paris are connected to the current compensation control circuit(130) in common. The current compensation control circuit measures current provided by the selected current cells to determine the amount of current to be compensated. The output of the current compensation circuit enters the segment current cells to compensate for current.
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