The digital control loop design for DVS unit in portable systems

Abstract EN

In the last decade, there has been a significant increase in integration density and computational complexity of processors in portable electronic systems.

Increasing the portable device integration has heightened the desire to reduce device power consumption based on the time varying computational workload.

Reducing power consumption has become a major challenge in the design and operation of today’s portable systems.

Dynamic voltage scaling (DVS) is an effective low-power design technique for reducing the power consumption of portable systems, which adjusts the supply voltage and correspondingly the clock frequency dynamically in order to obtain a minimum consumption of power to extend their lifetime use on a revolutionary scale.

This paper presents an implementation of a control loop design for practical real-time DVS unit in portable systems for controlling the change in the duty cycle of the DC-DC buck converter and thereby, the voltage and frequency are regulated.

MATLAB Simulation results are used to realize the controller design and verifying the range of saving power applied on realistic system workloads with varying execution times using different benchmark programs.