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A Mismatch Calibration Technique for SAR ADCs Based on Deterministic Self-Calibration and Stochastic Quantization.
- Source :
-
IEEE Transactions on Circuits & Systems. Part I: Regular Papers . Sep2020, Vol. 67 Issue 9, p2883-2896. 14p. - Publication Year :
- 2020
-
Abstract
- A capacitive DAC is an important building block of a charge-redistribution SAR ADC, for its size has a significant impact on performance. For medium- to high-resolution applications, the size of the DAC is typically determined by random mismatches. As such, an effective mismatch calibration circuit can allow the DAC to be scaled down to a much lower $kT/C$ noise limit, thereby increasing the overall ADC power efficiency. This paper reviews some of the most important reported mismatch calibration techniques and proposes a foreground calibration method based on a deterministic self-calibration and stochastic quantization. This approach is experimentally validated on a prototype 10-bit SAR ADC fabricated in TSMC 28-nm LP CMOS technology, demonstrating an INL and SFDR improvement of respectively 6.4 LSB and 14.9 dB at 85 MS/s. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15498328
- Volume :
- 67
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Circuits & Systems. Part I: Regular Papers
- Publication Type :
- Periodical
- Accession number :
- 145399745
- Full Text :
- https://doi.org/10.1109/TCSI.2020.2985816