A Mismatch Calibration Technique for SAR ADCs Based on Deterministic Self-Calibration and Stochastic Quantization
| Autor: | Mojtaba Bagheri, Filippo Schembari, Robert Bogdan Staszewski, Naser Pourmousavian, David G. Hasko, Hashem Zare-Hoseini |
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| Rok vydání: | 2020 |
| Předmět: |
Spurious-free dynamic range
Calibration (statistics) Computer science Capacitive sensing 020208 electrical & electronic engineering ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Linearity Successive approximation ADC Hardware_PERFORMANCEANDRELIABILITY 02 engineering and technology Noise (electronics) Least significant bit CMOS Hardware_INTEGRATEDCIRCUITS 0202 electrical engineering electronic engineering information engineering Electronic engineering Electrical and Electronic Engineering |
| Zdroj: | IEEE Transactions on Circuits and Systems I: Regular Papers. 67:2883-2896 |
| ISSN: | 1558-0806 1549-8328 |
| DOI: | 10.1109/tcsi.2020.2985816 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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