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rectification scheme for the piezoelectric input, an adaptive feedback for ULP conditioning, Zero-Current Switching (ZCS) for semi-lossless switching, a self-start circuit for low ambient startup, a Boost ... converter, a Buck regulator, a fuzzy-based micro-battery charger and a de-multiplexer to switch between harvesting or charging capabilities. ... Im et al. (2012) also reported usages of MPPT control on 0.13-µm CMOS process chip capable of providing 2.7 mW from 40mV to 300 mV supply with 61% efficiency at 2 V outputs where a transformer is self-started ...doi:10.3844/ajassp.2013.1240.1251 fatcat:a2qcggbj2ndglb3m3p22kfyrt4