Title :
A ripple voltage sensing MPPT circuit for ultra-low power microsystems
Author :
Inhee Lee ; Suyoung Bang ; Dongmin Yoon ; Myungjoon Choi ; Seokhyeon Jeong ; Sylvester, Dennis ; Blaauw, D.
Author_Institution :
Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
We propose a maximum power point tracking (MPPT) circuit for micro-scale sensor systems that measures ripple voltages in a switched capacitor energy harvester. Compared to conventional current mirror type MPPT circuits, this design incurs no voltage drop and does not require high bandwidth amplifiers. Using correlated double sampling, high accuracy is achieved with a power overhead of 5%, even at low harvested currents of 1.4uA based on measured results in 180nm CMOS.
Keywords :
CMOS integrated circuits; amplifiers; energy harvesting; maximum power point trackers; micromechanical devices; switched capacitor networks; CMOS; MPPT circuit; high bandwidth amplifiers; maximum power point tracking; ripple voltage sensing; switched capacitor energy harvester; ultra-low power microsystems; Batteries; Capacitors; Logic gates; Maximum power point trackers; Monitoring; Switches; Voltage measurement;
Conference_Titel :
VLSI Circuits (VLSIC), 2013 Symposium on
Conference_Location :
Kyoto
Print_ISBN :
978-1-4673-5531-5
