| 摘要 |
PROBLEM TO BE SOLVED: To provide a current cell circuit in a digital-analog converter that compensate the amount of current which decreases as output voltage becomes high and minimizes the current variation amount, by converting voltage detected from the current cell circuit into current and extending the range of output voltage. SOLUTION: The current cell circuit in a digital-analog converter includes: a current source connected to a power supply voltage end and generating current with a constant magnitude; a first current switch for transmitting current supplied by the current source to a first output terminal; a first current generating part for detecting output voltage of the first output terminal and generating amount of current decreasing from the detected voltage; and a first current supplying part for supplying the amount of current generated by the first current generating part to the first current switch. COPYRIGHT: (C)2009,JPO&INPIT
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