All Digital Energy Sensing for Minimum Energy Tracking

All Digital Energy Sensing for Minimum Energy Tracking

Abstract— Minimizing energy consumption is of utmost importance in an energy starved system with relaxed performance requirements. This brief presents a digital energy sensing method that requires neither a constant voltage reference nor a time reference. An energy minimizing loop uses this to find the minimum energy point and sets the supply voltage between 0.2 and 0.5 V. Energy savings up to 1 275% over existing minimum energy tracking techniques in the literature is achieved.A whole class of systems, such as wireless sensor systems for remote monitoring, implantable medical electronic devices, and so on,has been made possible by ultralow-power very large scale integration circuits. These systems are often severely constrained in size, and the battery supplying energy will therefore be of limited capacity. Since it is often inconvenient or infeasible to replace the battery, it is paramount to minimize < Final Year Projects 2016 > the net energy consumed by the system to maximize its lifetime.