Calibrated line driver with digital-to-analog converter
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United States of America Patent
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Nov 6, 2001
Grant Date -
N/A
app pub date -
Nov 22, 1999
filing date -
Nov 22, 1999
priority date (Note) -
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Abstract
In a line driver that utilizes a digital-to-analog converter (DAC) to generate a current that is used to form an output voltage V.sub.OD, variations in the output voltage V.sub.OD are minimized by a calibration circuit that senses the output voltage V.sub.OD, compares the output voltage V.sub.OD to a reference voltage, and then increments or decrements the bias current fed into the DAC to match the output voltage V.sub.OD to the reference voltage.
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