By Gabriele Manganaro

Have to wake up to hurry quick at the most recent advances in excessive functionality info converters? wish aid picking out the easiest structure to your program? With every thing you want to learn about the major new converter architectures, this consultant is for you. It provides uncomplicated ideas, circuit and procedure layout innovations and linked trade-offs, removing 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 quick precis of the fundamental fundamentals. sensible examples describing genuine chips, in addition to wide comparability among architectural or circuit ideas, ease structure choice and assist you lower layout time and engineering danger. Trade-offs, merits and drawbacks of every alternative are positioned into point of view with a dialogue of destiny developments, displaying the place this box is heading, what's riding it and what crucial unanswered questions are

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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.

The parameter could be trimmed at wafer level, before the dies are diced; or it could be trimmed at die level, before the die is packaged; or it could be trimmed after packaging; in some rare cases, the manufacturer may agree to provide untrimmed devices to the final user, who will directly perform the one-time trimming at the destination), will need to be carefully thought through. Various types of trimming are used nowadays and vary according to the method used to correct and set the final value of the desired parameter.

In this FOM the role of the output swing is indirectly captured through IOpk . Emphasis is instead placed on the transfer of signal power to the load RL . 25 in front of the power provided by the supply Psupply is used in order to allow the theoretical maximum of this ratio to be 100%. Before concluding this discussion we should briefly mention, without digressing too much, something that concerns the computation of FOMs. Specifically, when comparing the FOM values reported in papers and technical reports the reader should be warned about the consistency (or lack thereof) in the computation of such values.

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