Portal de Periódicos da CAPES

A 40-nm CMOS Piezoelectric Energy Harvesting IC for Wearable Biomedical Applications

2021; Multidisciplinary Digital Publishing Institute; Volume: 10; Issue: 6 Linguagem: Inglês

10.3390/electronics10060649

2079-9292

Chua‐Chin Wang, Lean Karlo S. Tolentino, Pin‐Chuan Chen, John Richard E. Hizon, Chung-Kun Yen, Cheng-Tang Pan, Ya‐Hsin Hsueh,

Energy Harvesting in Wireless Networks

This investigation presents an energy harvesting IC (integrated circuit) for piezoelectric materials as a substitute for battery of a wearable biomedical device. It employs a voltage multiplier as first stage which uses water bucket fountain approach to boost the very low voltage generated by the piezoelectric. The boosted voltage was further improved by the boost DC/DC converter which follows a predefined timing control directed by the digital logic for the said converter to be operated efficiently. TSMC 40-nm CMOS process was used for implementation and fabrication of the energy harvesting IC. The chip’s core has an area of 0.013 mm2. With an output of 1 V which is enough to supply the wearable biomedical devices, it exhibited the highest pump gain and accommodated the lowest piezoelectric generated voltage among recent related works.