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Ultra-low-power variable-resolution successive approximation ADC for biomedical application

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5 Author(s)
Le, H.P. ; Centre of Telecommun. & Microelectron., Victoria Univ., Melbourne, Vic., Australia ; Singh, J. ; Hiremath, L. ; Mallapur, V.
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An ultra-low-power variable-resolution successive approximation analogue-to-digital converter (ADC) is presented. A novel binary search algorithm architecture is proposed to replace the conventional digital-to-analogue converter to significantly reduce system area and power consumption. The proposed ADC consumes less than 22.2 μW of power at a conventional 2 V battery supply with a sampling rate of 200 samples/s, and standby power consumption of less than 1 μW.

Published in:

Electronics Letters  (Volume:41 ,  Issue: 11 )