Ultra-low power series pass element voltage regulator for RF-DC energy harvesting

In conclusion, a novel ultra-low power distributing system for RuOx electrochemical cell is developed implementing a switched capacitor DC-DC converter and a single series pass element voltage regulator. With one single depletion mode MOSFET, battery output voltage is regulated to have long lifetime of the cell itself. Measurements of the circuits show that for the active mode of ad-hoc sensors, a charged battery discharges its charges through a switch capacitor DC-DC converters and voltage regulator. Therefore, we can observe a regulated output voltage at the end of our power distribution system.