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Mobile and IoT applications must balance increasing processing demands with limited power and cost budgets. Approximate computing achieves this goal leveraging the error tolerance features common in many emerging applications to reduce power consumption. In particular, adequate (i.e., energy/quality-configurable) hardware operators are key components in an error tolerant system. Existing implementations...
With the scaling of CMOS technologies, the gap between nominal supply voltage and threshold voltage has decreased significantly. This trend is further amplified in low-power nanometer libraries, which feature cells with identical size and functionality, but different threshold voltages. As a consequence, different cells may have different delay behaviors as the temperature varies within a circuit...
The effects of temperature on delay depend on several parameters, such as cell size, load, supply voltage, and threshold voltage. In particular, variations in Vth can yield a temperature inversion effect causing a decreases of cell delay as temperature increases. This phenomenon, besides affecting timing analysis of a design, has important and unforeseeable consequences on power optimization techniques...
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