1. Montek Singh COMP790-084 Sep 27, 2011

2.  Case studies ◦ CEA-LETI (power management) ◦ Univ. of Newcastle (power management) ◦ Imperial College (biosensors)  Next time: ◦ UCLA (solar) ◦ Caltech (acoustic) ◦ Challenges and Benefits ◦ Open questions

3.  Managy ◦ power management subsystem  harvested power vs. stored power  low/medium/high power modes ◦ In center is digital power controller ◦ multiple harvestors ◦ multiple sensors ◦ multiple processing “loads”

4.  Convert analog events (energy level change, sensor input)…  … to asynchronous digital event for controller

5.  Background: switched capacitor power converters ◦ reconfigure topology to convert voltages

6.  Propose capacitor bank with an intelligent switching controller

7.  Piezoelectric harvesters  Experiments with different voltage converters

8.  Biosensors/harvesters ◦ directly attached to human body