Download Advanced data converters by Gabriele Manganaro PDF

By Gabriele Manganaro

Have to wake up to hurry fast at the most up-to-date advances in excessive functionality information converters? wish support deciding upon the simplest structure in your program? With every thing you must find out about the main new converter architectures, this consultant is for you. It provides simple rules, circuit and approach layout innovations and linked trade-offs, eliminating long mathematical proofs and delivering intuitive descriptions prematurely. every thing from time-to-digital converters to comparator-based/zero-crossing ADCs is roofed and every subject is brought with a brief precis of the basic fundamentals. sensible examples describing genuine chips, in addition to huge comparability among architectural or circuit innovations, ease structure choice and assist you reduce layout time and engineering hazard. Trade-offs, benefits and downsides of every choice are positioned into point of view with a dialogue of destiny developments, displaying the place this box is heading, what's using it and what an important unanswered questions are.

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9 shows such an empirical chart for classic ADCs in the signal bandwidth7 BW versus signal-to-noise-and-distortion SNDR space at the time of writing. 7 An implicit assumption here is that the signal lies between DC and BW. Bandpass ADCs, for example, are not considered here. 10 Traditional DAC architectures in the BW–SFDR plane. Given the vast range of the two parameters, each architecture is shown to occupy a limited region (sketched as a fading ellipse) of such a space. Consistently with what has just been pointed out, since multiple architectures can be suitable for very similar specifications, it can also be seen how many regions show overlap between multiple architectures.

3) and THD = where a pure sine-wave signal of power Psig is assumed, Pnoise is the power of the noise, and Ph is the power of the harmonics. 4) and its reciprocal THD + N = 1/SNDR, which is more commonly encountered in digital audio applications [75]. ) and Pn is the power of the corresponding harmonic. 6) where Phmax is the power of the largest undesired signal (frequency-related or unrelated to the useful signal). Related to the SNR is also the dynamic range (DR), which is the power ratio between the largest and smallest detectable signals (the smallest being essentially the noise, which can either be the quantization noise or the actual device noise, depending on the specific case).

6 Summary This chapter was simply meant to give a refresher and, perhaps, to provide a slightly different view of many background concepts that will be needed in support of the material covered in the next chapters. 1 some of the performance metrics used in data conversion have been discussed. Although resolution and sampling rate are, without doubt, the two key parameters stated when quoting the specifications of a data converter, they are often insufficient to assess whether or not a converter will meet the needs of an application.

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