Digital-to-analog converter
AssigneeHimax Technologies Limited
InventorsPing-Po Chen, Guo-Ying Hsu
Life of this patent
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Abstract
A digital-to-analog converter and method for transforming a digital value into an analog signal are disclosed. The digital-to-analog converter has a voltage generator, a voltage selector, a multiplexer and a switch array. The voltage generator provides a first and second group of voltages. The voltage selector selectively outputs the first or second group of voltages according to a polarity signal. The multiplexer selectively outputs the digital value or a complementary value of the digital value according to the polarity signal. The switch array outputs one of the voltages received from the voltage selector according to the value output from the multiplexer.
Claims9
A digital-to-analog converter for transforming a digital value into an analog signal, comprising:
- a voltage generator providing a first and second group of voltages, wherein each of the voltages in the first group is a counterpart of one of the voltages in the second group, and each of the voltages in the first group and its counterpart in the second group correspond to the same gray level;
- a voltage selector selectively outputting the first or second group of voltages according to a polarity signal;
- a multiplexer selectively outputting the digital value or a complementary value thereof according to the polarity signal;
- and
- a switch array outputting one of the voltages received from the voltage selector according to the value output from the multiplexer.
A method for transforming a digital value into an analog signal, comprising the steps of:
- providing a first and second group of voltages wherein each of the voltages in the first group is a counterpart of one of the voltages in the second group, and each of the voltages in the first group and its counterpart in the second group correspond to the same gray level;
- selecting the first or second group of voltages according to a polarity signal;
- selecting the digital value or a complementary value thereof according to the polarity signal;
- and
- outputting one of the voltages in the selected group according to the selected value.
Dependencies are inferred from the claim text.