By Dominique Dallet, Jose Machado da Silva
ISBN-10: 0387259023
ISBN-13: 9780387259024
ISBN-10: 0387259031
ISBN-13: 9780387259031
The Analogue-to-digital converter (ADC) is the main pervasive block in digital platforms. With the appearance of robust electronic sign processing and electronic verbal exchange thoughts, ADCs are quickly turning into serious elements for system’s functionality and suppleness. realizing safely all of the parameters that characterise their dynamic behaviour is important, on one hand to pick the main sufficient ADC structure and features for every finish program, and however, to appreciate how they have an effect on functionality bottlenecks within the sign processing chain. Dynamic Characterisation of Analogue-to-Digital Converters offers a cutting-edge evaluation of the equipment and tactics hired for characterising ADCs’ dynamic functionality behaviour utilizing sinusoidal stimuli. the 3 classical equipment – histogram, sine wave becoming, and spectral research – are completely defined, and new ways are proposed to bypass a few of their barriers. this can be a must-have compendium, that are utilized by either lecturers and attempt execs to appreciate the elemental arithmetic underlining the algorithms of ADC checking out, and as an guide to assist the engineer within the most crucial and significant info for his or her implementation.
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4. Terminology In the ADCs’ domain one can often find different terms meaning the same thing, or to find different definitions for the same terms. , while some use DNL for Differential NonLinearity, others use ED [126, 153]. To designate the effective number of bits acronyms like EN B, N OEB, EN OB, E, bef are likely to be found. In this case we suggest to use Nef as N is already used to identify the number of bits. In order to have a single symbol to identify common parameters, η is used to designate parameters or quantities related to noise, ε is used for those related to errors, and σ for those concerning deviation.
It is likely that only one of signal to noise ratio (SNR or S/N) and signal to noise and distortion ratio (SINAD) is specified. Frequently, the parameter total harmonic distortion plus noise (THD+N) is used instead of SINAD. Many manufacturers define the same specification differently, or use different methods to evaluate the parameters. For example, the range (number) of frequencies which are considered as harmonics (excluding DC) varies — some use the first ten harmonics [6], others only the second through the sixth harmonics [151], but specific applications may require considering all harmonics in the frequency range of interest.
Mathematically, the transfer characteristic is a set of correlations between each of the fractional parts of the total analogue input range and the corresponding digital output codes. 1 Nominal transfer characteristic. The transfer characteristic determined by the nominal code transition levels. 6. (2N − 1). 5. The transition levels in a real ADC differ from the nominal ones; in some of them (adjustable ADCs) it is possible, by external trimming, to bring some of the transition levels (typically the first and the last) close to the nominal ones.
Dynamic Characterisation of Analogue-to-Digital Converters (Kluwer international series in engineering and computer science, Volume 860) by Dominique Dallet, Jose Machado da Silva
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