What are the differences between Adaptive Voltage Scaling (AVS) and Elastix Voltage Scaling (EVS)?
With AVS, the circuit adapts its voltage to the operating conditions in such a way that the delays of the logic can still be accommodated by the clock period. The goal in EVS is similar: adjusting the voltage to achieve a given throughput. However, the combination of elasticity with voltage scaling can provide superior voltage reductions and new opportunities for system-level power management. In AVS, the clock period is defined externally and is totally uncorrelated with the delays of the logic. A guard band must be conservatively defined to prevent the circuit from exceeding the clock period under any circumstances. In EVS, the Elastic Clock delay is highly correlated with the internal logic of the circuit. The guard band is already defined for the matched delays that generate the Elastic Clock according to the existing correlation. No other guard bands are required to synchronize with any external delay reference. Thus power consumption is lowered through the use of smaller guard ba
