7 August 2017 Adaptive sub-ranging ADC with autocalibration of internal components offsets
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Proceedings Volume 10445, Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2017; 104456F (2017) https://doi.org/10.1117/12.2281026
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2017, 2017, Wilga, Poland
Abstract
The paper presents a new method for autocalibration of offsets of internal components in adaptive sub-ranging analog-todigital converters (ADCs). The adaptive sub-ranging ADCs, like other iterative ADCs, are very sensitive to offsets caused by technological imperfections. To achieve higher effective resolution in a sub-ranging ADC, offsets should be accordingly diminished, which is achieved using sophisticated techniques usually causing increase of power consumption as well as complexity and size of ADC. But the structure of adaptive sub-ranging ADC and the way of calculation of output codes create a possibility to compensate offsets during conversion of input samples. Moreover, using the internal digital-to-analog converter (DAC) as a source of calibration signal in the procedure of offsets estimation and addition of a calibration program in the digital part of the converter, enable automatization and autonomization (no additional instruments are needed) of the calibration process. Usefulness and limitations of the proposed solution were confirmed in computer simulations whose main results are presented and discussed in the paper. Implementation of the proposed solution enables to increase effective resolution of ADCs and simultaneously to weaken the requirements on acceptable level of offsets of ADC components.
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Konrad Jędrzejewski, Łukasz Małkiewicz, "Adaptive sub-ranging ADC with autocalibration of internal components offsets", Proc. SPIE 10445, Photonics Applications in Astronomy, Communications, Industry, and High Energy Physics Experiments 2017, 104456F (7 August 2017); doi: 10.1117/12.2281026; https://doi.org/10.1117/12.2281026
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