A 100-nW 9.1-ENOB 20-kS/s SAR ADC for Portable Pulse Oximeter

@article{Lee2015A19,
  title={A 100-nW 9.1-ENOB 20-kS/s SAR ADC for Portable Pulse Oximeter},
  author={Hokyu Lee and Sejin Park and Chaegang Lim and Chulwoo Kim},
  journal={IEEE Transactions on Circuits and Systems II: Express Briefs},
  year={2015},
  volume={62},
  pages={357-361}
}
This brief presents an energy-efficient 10-bit accuracy with 20-kS/s successive approximation register analog-to-digital converter for portable pulse oximeter. A data-dependent capacitor reset (DDCR) switching scheme for the capacitive digital-to-analog converter (CDAC) to reduce the average switching energy and the number of unit capacitors is proposed and implemented. Compared with the conventional capacitor switching scheme for CDACs, the proposed DDCR switching scheme reduces the average… CONTINUE READING

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