By Gabriele Manganaro
Have to wake up to hurry fast at the most recent advances in excessive functionality info converters? wish support opting for the easiest structure to your program? With every little thing you want to find out about the main new converter architectures, this advisor is for you. It provides uncomplicated ideas, circuit and approach layout strategies and linked trade-offs, eliminating long mathematical proofs and delivering intuitive descriptions prematurely. 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 basic fundamentals. functional examples describing genuine chips, besides vast comparability among architectural or circuit concepts, ease structure choice and assist you lower layout time and engineering danger. Trade-offs, merits and downsides of every alternative are positioned into viewpoint with a dialogue of destiny tendencies, displaying the place this box is heading, what's using it and what crucial unanswered questions are.
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Extra resources for Advanced data converters
In fact, current-steering DACs have many conceptual similarities to flash or folding–interpolating ADCs in that the architecture of current-steering DACs is composed of multiple open-loop differential pairs operating all in parallel to synthesize the output. This large degree of parallelism, combined with a very-high-speed topological design style focusing on creating the smallest possible circuits with the minimum associated parasitics allows this type of DACs to reach very high speeds of operation.
F s > 100 MS/s) current-steering DACs only, many different FOMs are found in the literature, and a few of them will be briefly reported here. Some of the “randomness” in DACs’ FOMs originates from the fundamental question of what performance metric(s) can more broadly capture the value and the technical challenges of a given design when considering such a very diverse and wide application space. Furthermore, some of the performance parameters tend to vary much more, over frequency, than in ADCs.
That is often true, for example, in the cases of temperature changes and average supply changes,8 since generally these happen with relatively slow time constants compared with the calibration speed. There are, however, important issues with background calibration that need to be accounted for. First, in order for parameter measurement to take place, in most cases, test stimuli (test signals, which can be either analog signals or digital data streams, depending on the specifics of the calibration taking place) need to be injected at critical nodes/sections, and, in fact, often these stimuli are superimposed on the converted (analog or digital) signal itself .
Advanced data converters by Gabriele Manganaro