Development of Op-Amp Based Piezoelectric Rectifier for Low Power Energy Harvesting ApplicationsMuhamad Syazmie Bin Sepeeh, Farahiyah Binti Mustafa, Anis Maisarah Binti Mohd Asry, Sy Yi Sim and Mastura Shafinaz Binti Zainal AbidinMATEC Web of Conferences, 150 (2018) 01012DOI: https://doi.org/10.1051/matecconf/201815001012