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Abstrakty
The characteristics of real converters, including sensors, are - to a smaller or larger extent - nonlinear. Nonlinearity may result from the technologies applied to produce the converter or from the type of processing to be realized by the converter. With respect to the mathematical model describing the characteristics, they can be characteristics with smooth nonlinearity or nonlinearity with discontinuities. The author presented the problem of elimination of nonlinearity with discontinuities from the converter characteristic, which appears in the small-value area, i.e. in the dead zone, with a method utilizing the technique of added noise (dither). The properties of a converter with modified characteristic are shown: the ability to process input signals that previously could not be processed because their values were within the dead zone; removal of discontinuities in the output signal within the range of small values.
Słowa kluczowe
Czasopismo
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Tom
Strony
491--500
Opis fizyczny
Bibliogr. 13 poz., rys., wykr.
Twórcy
autor
- Poznan University of Technology, Faculty of Electronics and Telecommunications, Poland, domanska@et.put.poznan.pl
Bibliografia
- 1. Zakrzewski J.: Measuring Sensors and Converters. Wydawnictwo Politechniki Śląskiej, Gliwice, 2004 (in Polish).
- 2. Schuchman L.: “Dither signals and their effect on quantization noise”. IEEE Trans. Commun. Technol., vol. 12, 1964, pp. 162-165.
- 3. Jayant N., Rabiner L.: “The application of dither to the quantization of speech signals”. Bell Syst. Techn. J.,vol. 51, 1972, pp. 1293-1304.
- 4. Gray R., Stockham T.: “Dithered quantizers”. IEEE Trans. Inform. Theory, vol. 39, 1993, pp. 805-812.
- 5. Wagdy M., Goff M.: “Linearizing average transfer characteristics of ideal ADC’s via analog and digital dither”. IEEE Trans. Instrum. Meas., vol. 43, 1994, pp. 146-150.
- 6. Carbone P., Petri D.: Performance of stochastic and deterministic dithered quantizers. IEEE Trans. Instrum. Meas., vol. 49, 2000, pp. 337-340.
- 7. Adamo F., Attivissimo F., Giaquinto N., Savino M.: “Measuring the static characteristic of dithered A/D converters. Measurement”, vol. 32, 2002, pp. 231-239.
- 8. Attivissimo F., Giaquinto N., Lancolla A., Savino M.: “Effects of midpoint linearization and nonsubtractive dithering in A/D convertrs”. Measurement, vol. 40, 2007, pp. 537-544.
- 9. Zames G., Shneydor N.: “Dither in non-linear systems”. IEEE Trans. Autom. Contr., vol. 21, 1976, pp. 660-667.
- 10. Iannelli L., Johansson K., Jönsson U., Vasca F.: “Dither for smoothing relay feedback systems”. IEEE Trans. Circuis Syst. I, Fundam. Theiry Appl., vol. 50, 2003, pp. 1025-1035.
- 11. Iannelli L., Johansson K., Jönsson U., Vasca F.: “Averaging of nonsmooth systems using dither”. Automatica, vol. 42, 2006, pp. 669-676.
- 12. Frasca R., Iannelli L., Vasca F.: “Dithered sliding-mode control for switched systems”. IEEE Trans. Circuis Syst. II, Express Briefs, vol. 53, 2006, pp. 872-876.
- 13. Kajita T., Moon U., Temes G.: “A two-chip interface for a MEMS accelerometer”. IEEE Trans. Instrum. Meas., vol. 51, 2002, pp. 853-858.
Typ dokumentu
Bibliografia
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bwmeta1.element.baztech-article-BSW1-0049-0009