By Dominique Dallet, Jose Machado da Silva
The Analogue-to-digital converter (ADC) is the main pervasive block in digital platforms. With the arrival of strong electronic sign processing and electronic conversation ideas, ADCs are quickly turning into severe elements for system’s functionality and suppleness. realizing thoroughly the entire parameters that characterise their dynamic behaviour is important, on one hand to pick the main enough ADC structure and features for every finish program, and nonetheless, to appreciate how they impact functionality bottlenecks within the sign processing chain. Dynamic Characterisation of Analogue-to-Digital Converters offers a state-of-the-art assessment of the tools and techniques 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 avoid a few of their barriers. this can be a must-have compendium, which are utilized by either lecturers and try pros to appreciate the elemental arithmetic underlining the algorithms of ADC checking out, and as an guide to aid the engineer within the most crucial and significant info for his or her implementation.
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Extra info for Dynamic Characterisation of Analogue-to-Digital Converters (Kluwer international series in engineering and computer science, Volume 860)
2 describes the test setup for two-tone measurements. If additional tones are needed, the same 47 D. Dallet and J. ), Dynamic Characterisation of Analogue-to-Digital Converters, 47–60. © 2005 Springer. Printed in the Netherlands. 1. Test Setup for Sine Wave Testing. type of setup can be used by combining the output of the required number of sinewave synthesizers. For IMD testing, an additional bandpass filter may be required after the combination of the tones in order to reduce the IMD of the input signal.
2 (continued) Characteristics of ADCs per application. 13 14 ADC DYNAMIC CHARACTERISATION In the first GSM generation 8 bit SAR (successive approximations) converters were used. Comparing to Σ∆ these converters present the advantage of joining smaller size, lower power, and lower latency, but on the other hand require stringent trimming to achieve good accuracy and more tight front-end anti-aliasing filtering. Automatic control is a field where their fast sampling with no latency and good resolution match well together.
3). It follows that the transition T [k] between codes (k − 1) and k may occur at several different input levels. Tnom [k]) The code transition level specified Nominal code transition level (T by the manufacturer as a function of Vf s 4 . 4A deviation of the code transition levels from their respective nominal values leads to the occurrence of an integral linearity error in the transfer characteristic. ADCs’ Applications and Terminology 29 Midcode bin value The analogue value for the centre of the code bin, except for the code bins at the two ends of the total range of analogue values5 .