As silicon fabrication technologies used to construct ICs - microprocessors, FPGAs, or special-function devices such as network or communications processors - have gone from generation to generation, the number of transistors has grown ever-larger, the individual devices have grown smaller, and the operating voltage they can tolerate has diminished. The core voltage that such a chip runs at today may be less than 1 V; 0.9 V is commonplace.
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