Semiconductor device and method for driving the same
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United States of America Patent
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Aug 6, 2013
Grant Date -
Oct 4, 2012
app pub date -
Mar 28, 2012
filing date -
Apr 1, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
To provide a semiconductor device including an A/D converter circuit that is capable of performing A/D conversion with high accuracy and high resolution and that can be reduced in size. One loop resistance wiring is shared by a plurality of power supply switches and a plurality of output circuits, and a reference voltage having a triangular (step-like) wave generated using the resistance wiring and the plurality of power supply switches is utilized. Thus, high-accuracy digital signals can be obtained using such an A/D converter circuit that can be reduced in size as an output circuit, without using a complicated circuit structure. Further, the number of constituent elements of the A/D converter circuit is small, whereby in the case of providing A/D converter circuits in parallel, variation between the A/D converter circuits can be made small.
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