By Gabriele Manganaro
Have to wake up to hurry fast at the most up-to-date advances in excessive functionality info converters? wish aid selecting the easiest structure to your program? With every thing you want to find out about the most important new converter architectures, this consultant is for you. It offers easy ideas, circuit and approach layout innovations and linked trade-offs, removing long mathematical proofs and delivering intuitive descriptions in advance. every little 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 fundamental fundamentals. sensible examples describing genuine chips, besides huge comparability among architectural or circuit ideas, ease structure choice and assist you lower layout time and engineering danger. Trade-offs, benefits and drawbacks of every alternative are placed into point of view with a dialogue of destiny traits, displaying the place this box is heading, what's riding it and what an important unanswered questions are
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Additional resources for Advanced Data Converters
This is what is referred to as background calibration since the measurement– correction process is happening in the background and invisible to the outside world [98, 99]. Alternatively, the operation of the converter can be interrupted, whereupon the converter becomes unavailable to perform the normal conversion process, the calibration then takes place, and, once that has been completed, the converter again becomes available for its normal mode of operation. In the latter case we talk about foreground calibration [73, 100].
It, in fact, has a number of limitations that it is now important to highlight. If what has just been described is applied to a standard linear analog circuit such as an amplifier then, as the input amplitude approaches full scale or the supply voltage, the output begins soft-limiting/compressing. Hence, for example, the power curve of the fundamental does not keep the unity slope but starts to flatten. The two curves, in fact, simply do not meet for realistic power values. 4 As has previously been pointed out, in a data converter, the concept of an intercept point needs to be taken with a grain of salt.
For example, the experience of the design team with a particular architecture or the availability of an existing IP that could be re-used to shorten the development time would often take a higher priority than, for example, choosing the architecture with the most optimal power or area for the case at hand. Once that has been said, it is possible to roughly sketch a “map” of where classic converter architectures fit with respect to the main key performance metrics. 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.