Open AccessA simple passive 390 mV ac/dc rectifier for energy harvesting applications
Author(s) -
A. Santiago Rodriguez,
Nicolas Garraud,
D. Alabi,
Alexandra Garraud,
David P. Arnold
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1407/1/012018
Subject(s) - rectifier (neural networks) , electrical engineering , nmos logic , voltage , power (physics) , capacitor , diode , energy harvesting , computer science , materials science , topology (electrical circuits) , engineering , physics , transistor , stochastic neural network , quantum mechanics , machine learning , recurrent neural network , artificial neural network
This paper reports a simple, discrete, ac/dc rectifier architecture intended for magnetic energy harvesters that functions with ac input voltages as low as 390 mV pk . The proposed four NMOS rectifier (4NR) employs cross-connected, saturated-load NMOS inverters. The circuit is completely passive, exhibits good low-voltage performance, consists of only four components for small footprint, and requires no additional blocking diode to prevent power flow from the load. At 2 V pk input, the 4NR exhibits a power efficiency of 93 % and 400 μW of output power. The 4NR is also successfully connected to an off-the-shelf TI BQ25504 dc/dc converter + battery management chip and shown to charge both capacitor and lithium-ion battery energy storage reservoirs.