1. Self-Powered Operational Amplifying System with a Bipolar Voltage Generator Using a Piezoelectric Energy Harvester
- Author
-
Tae Hyun Sung, Seong Do Hong, Jeong Pil Jhun, Hamid Jabbar, Jae Yong Cho, Se Yeong Jeong, Wonseop Hwang, and Jung Hwan Ahn
- Subjects
energy harvesting ,Materials science ,Computer Networks and Communications ,lcsh:TK7800-8360 ,energy supply ,02 engineering and technology ,01 natural sciences ,Signal ,law.invention ,Generator (circuit theory) ,law ,0103 physical sciences ,Electrical and Electronic Engineering ,bipolar-voltage generator ,Polarity (mutual inductance) ,010302 applied physics ,business.industry ,lcsh:Electronics ,piezoelectric material ,Electrical engineering ,021001 nanoscience & nanotechnology ,Piezoelectricity ,Power (physics) ,equivalent circuit model ,Hardware and Architecture ,Control and Systems Engineering ,Signal Processing ,Operational amplifier ,0210 nano-technology ,business ,Energy harvesting ,Voltage - Abstract
Piezoelectric devices previously studied usually generated a single voltage to power an electronic device. However, depending on the user’s purpose, the electronic device may need dual power supply. Here, we report a self-powered bipolar voltage generator using a piezoelectric energy harvester with two piezoelectric devices. When a force is applied to the piezoelectric energy harvester, the two piezoelectric devices separately supply positive and negative voltages to the operational amplifier that requires dual power supply to amplify an AC signal that have positive and negative polarity. At the same time, the harvester supplies additional power to an electronic device through a DC-to-DC converter with an output voltage of 3.3 V. This technique proves the feasibility of applying the piezoelectric energy harvester to operational amplifying systems in the field of sound, earthquake, and sonar that require both bipolar and single voltages without external power sources.
- Published
- 2019
- Full Text
- View/download PDF