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| The Evaluation Method of Effective Bits of A/D Converters Based on Sinusoidal Distortion Measurement |
| LIANG Zhi-guo |
| National Key Laboratory of Science and Technology on Metrology & Calibration, Changcheng Institute of Metrology and Measurement, Beijing 100095,China |
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Abstract Aiming at the measurement of effective bits of A/D converters, a method based on sinusoidal distortion measurement is presented, and the calculation formula is given out.One can realize the calibration of effective bits of A/D converters without complicated sinusoidal curve-fitting.When A/D bit varying from 3 bits to 24 bits, and sampling rate to frequency ratio is varied, by using a group of simulation, the measurement method is compared with the sine wave curve-fitting method.The results show that, the sinusoidal curve-fitting method fit for more cases, but the method is more simple and easy.Through a group of experiments, both the feasibility and correctness of the method in this paper are proved.
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2014, Vol. 35 
