Energy-efficient circuit architectures and sustainable power management systems

Energy or power consumption is one of the key issues in VLSI design. The issues of energy or power are so crucial that they alone can, at times, determine what can be implemented. Developing a product that consumes power is certainly not sustainable! The total power consumed by a VLSI circuit is supplied by a voltage source and is given by the product of the digital circuit switching voltage V and the total circuit current I drawn from the power supply. Thus, reducing power consumption in VLSI circuits can be achieved by lowering either the current or the voltage at a constant temperature. It is also feasible and scientifically sensible to exponentially relate the power consumption of digital circuits to the magnitude of the supply voltage V which is raised to the square.