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A high energy-efficiency and low-area switching scheme for SAR ADCs

Momeni, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1007/s10470-020-01744-4
  3. Publisher: Springer , 2020
  4. Abstract:
  5. A high energy-efficiency and low-area switching method is proposed for the successive approximation register analog-to-digital converters. In the proposed scheme, the threshold voltage for comparison is derived from the charge sharing technique and using a voltage source connected to the bottom plates of the digital-to-analogue converter (DAC) capacitors. The switching method achieves an average DAC switching energy and DAC area reduction of 99.15% and 84.27%, respectively, with respect to the conventional method. The differential nonlinearity and integral nonlinearity of the proposed scheme are 0.1288 LSB and 0.1207 LSB, respectively. In addition, in the proposed method, the number of DAC switches is lower than the conventional and some other methods, which avoids further complicating the logic circuit as well as increasing wiring and area. Moreover, only one voltage source is used as a reference voltage, which makes us needless to have an extra voltage source that must be very accurate. © 2020, Springer Science+Business Media, LLC, part of Springer Nature
  6. Keywords:
  7. DAC ; DAC switching energy ; Low power ; SAR ADCs ; Analog to digital conversion ; Computer circuits ; Switching ; Threshold voltage ; Conventional methods ; Differential nonlinearity ; High energy efficiency ; Integral nonlinearity ; Reference voltages ; Successive approximation register analog-to-digital converter ; Switching methods ; Switching scheme ; Energy efficiency
  8. Source: Analog Integrated Circuits and Signal Processing ; 18 November , 2020
  9. URL: https://link.springer.com/article/10.1007/s10470-020-01744-4