A/D converter, flash

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    n. A device that very quickly digitizes an analog input voltage. A flash converter compares the input to a number of reference sources in a single clock cycle. They’re fast! But they use one comparator per input step (16 for a 4-bit A/D, 256 for 8 bits), so they are expensive for any but the smallest resolution applications. And they’re power hogs too. Here, flash means lightning quick, rather than having any similarity to flash memory technology.

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