ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
Precision and wide-band analog-to-digital converters (ADC) are used for informationprocessing in mechatronic systems. The analog signal transformation circuits, such as sample, andhold circuit (SHC) and an analog signal interpolation circuit (ASIC), are applied with the aim ofincreasing the precision of converters. These circuits allow for reducing the quantity of comparatorsin the converter and increase their dynamic stability. The models of SHC and ASIC as well as theresults of the calculation precision and dynamic parameters of such circuits are presented in thispaper. Equations for the calculation of the aperture error in the Gaussian and a sinusoidal inputsignal were derived. The structural model, proposed for SHC, evaluates the nonlinearity of atransfer characteristic, and the influence of noise in the signal and strobe channels. The results ofthe theoretical research and analytical equations for the evaluation of the number of signalinterpolation block differential amplifiers, which depends on the analog signal’s maximal frequencyand the number of segments of the converter, are presented. The results of this work allow one toestimate the main precision and dynamic parameters of ADC transformation circuits
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.113.131.pdf
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