https://scholars.lib.ntu.edu.tw/handle/123456789/501234
Title: | A 12-bit 200kS/s subranging SAR ADC with an energy-curve reshape technique | Authors: | Hu, Y.-S. Lin, K.-Y. HSIN-SHU CHEN |
Keywords: | Analog to digital converter (ADC); low power; smart wake-up; subranging; successive approximation register (SAR); touch sensing | Issue Date: | 2017 | Start page/Pages: | 149-152 | Source: | 2016 IEEE Asian Solid-State Circuits Conference, A-SSCC 2016 - Proceedings | Abstract: | This paper presents an energy-efficient 12-bit 200kS/s subranging SAR ADC for multi-touch sensing applications. In order to reduce DAC power consumption, an energy-curve reshape technique is proposed to fit the switching energy curve to the characteristics of Rx signals. An auxiliary polarity quantizer joined with the well-known bottom-plate sampling not only can eliminate the gain mismatch of the subranging architecture but also can be as effective as the top-plate sampling. The ADC low-voltage operation could support the smart wake-up mode in the touch sensing system without using dual reference voltages. A pulse-type self-trigger latch technique is utilized to decrease digital loop power dissipation in the low-voltage environment. This ADC consumes 0.95 μW at 200kS/s under a 0.7V supply in 40nm CMOS technology. It achieves an SNDR of 69.24dB at Nyquist rate and results in an FoM of 2fJ/c.-s. © 2016 IEEE. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/501234 | DOI: | 10.1109/ASSCC.2016.7844157 | SDG/Keyword: | Energy efficiency; Wakes; Analog to digital converters; Low Power; subranging; Successive approximation register; Touch sensing; Wake up; Analog to digital conversion |
Appears in Collections: | 電機工程學系 |
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