TY - JFULL AU - I Made Darmayuda and Chai Tshun Chuan Kevin and Je Minkyu PY - 2013/10/ TI - Modified Buck Boost Circuit for Linear and Non-Linear Piezoelectric Energy Harvesting T2 - International Journal of Electronics and Communication Engineering SP - 1172 EP - 1177 VL - 7 SN - 1307-6892 UR - https://publications.waset.org/pdf/16656 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 81, 2013 N2 - Plenty researches have reported techniques to harvest energy from piezoelectric transducer. In the earlier years, the researches mainly report linear energy harvesting techniques whereby interface circuitry is designed to have input impedance that match with the impedance of the piezoelectric transducer. In recent years non-linear techniques become more popular. The non-linear technique employs voltage waveform manipulation to boost the available-for-extraction energy at the time of energy transfer.  The fact that non-linear energy extraction provides larger available-for-extraction energy doesn’t mean the linear energy extraction is completely obsolete. In some scenarios, such as where initial power is not available, linear energy extraction is still preferred. A modified Buck Boost circuit which is capable of harvesting piezoelectric energy using both linear and non-linear techniques is reported in this paper. Efficiency of at least 64% can be achieved using this circuit. For linear extraction, the modified Buck Boost circuit is controlled using a fix frequency and duty cycle clock. A voltage sensor and a pulse generator are added as the controller for the non-linear extraction technique.  ER -