Pre-charge solution for low-power, area-efficient SAR ADC
In this paper, a new method is proposed to reduce the power consumption and occupied area of successive-approximation register analog to digital converters (SAR ADCs). The proposed solution is based on pre-charged capacitor array consisting of identical unit capacitors. According to the new method,...
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| Format: | Article |
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The Institute of Electronics, Information and Communication Engineers (IEICE)
2015
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| Summary: | In this paper, a new method is proposed to reduce the power consumption and occupied area of successive-approximation register analog to digital converters (SAR ADCs). The proposed solution is based on pre-charged capacitor array consisting of identical unit capacitors. According to the new method, switching operations to determine the least significant bits are replaced by adding pre-charged capacitors to the main capacitor array. This method is applicable for binary-weighted capacitor arrays with different switching schemes. With the presented method, switching energy and the number of unit capacitors are reduced by at least 50%. |
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