Download Advanced Data Converters by Gabriele Manganaro PDF
By Gabriele Manganaro
Have to wake up to hurry quick at the most up-to-date advances in excessive functionality information converters? wish aid determining the simplest structure to your software? With every thing you want to find out about the main new converter architectures, this advisor is for you. It offers simple rules, circuit and method layout options and linked trade-offs, eliminating long mathematical proofs and supplying 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 fundamental fundamentals. functional examples describing genuine chips, besides huge comparability among architectural or circuit thoughts, ease structure choice and assist you lower layout time and engineering chance. Trade-offs, benefits and downsides of every choice are placed into standpoint with a dialogue of destiny traits, exhibiting the place this box is heading, what's using it and what an important unanswered questions are
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Additional info for Advanced Data Converters
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. In some papers the power consumption P used in the computation may include all circuit blocks.
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. Referring again to the example of the poly resistor, all five contacts could be normally closed before trimming and then, after trimming, all contacts that need to be open may be blown up like electrical fuses by locally enforcing a high current, or using a laser etc. g. EPROM, or EEPROM etc. or, again, an array of fuses that can be selectively blown up) can be integrated on the die, and the status of the bits in this memory could drive the switches selecting the desired trim.
This coupling needs to be controlled or masked to be negligible. On the other hand, during foreground calibration the converter is not processing any input signals. Therefore neither the signal range issue nor the coupling issue exists. However, the calibration is now unable to track directly environmental changes such as varying temperature or supply. To attempt to amend that, if the application allows it, the converter could be switched from regular conversion mode to calibration mode to be re-calibrated and to compensate for the changes that occurred while it was operating.