A 0.6 V, 1.66mW energy harvester and audio driver for tympanic membrane transducer with wirelessly optical signal and power transfer

Author

Jhong-Ting Jian ; Yu-Lin Song ; Chia-Fone Lee ; Yuan-Fang Chou ; Wei-Zen Chen

Author_Institution

Dept. of Electron. Eng., Nat. Chiao-Tung Univ., Hsinchu, Taiwan

fYear

2014

fDate

1-5 June 2014

Firstpage

874

Lastpage

877

Abstract

An energy harvester and ultra-low-voltage audio driver to mechanically stimulate tympanic membrane (TM) transducer is presented. By wirelessly optical signal and power transfer, the audio driver is able to directly drive the actuator on the TM to improve sound quality while avoiding occlusion effects. The measured THD+N is 0.4% over the audio bandwidth with modulation index of 0.4, and maximum power conversion efficiency is 24.7%. The core circuits dissipate 1.66mW from 0.6 V through optical power transfer. Fabricated in TSMC 90 nm CMOS technology, the chip size is 0.88×0.84mm².

Keywords

CMOS integrated circuits; acoustic transducers; acousto-optical signal processing; audio signal processing; energy harvesting; TM transducer; TSMC CMOS technology; audio bandwidth; chip size; core circuits; energy harvester; maximum power conversion efficiency; modulation index; occlusion effects; optical power transfer; optical signal; power 1.66 mW; size 90 nm; tympanic membrane transducer; ultra-low-voltage audio driver; voltage 0.6 V; Actuators; IP networks; Lasers; Pulse width modulation; Receivers; Resistance; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2014 IEEE International Symposium on

Conference_Location

Melbourne VIC

Print_ISBN

978-1-4799-3431-7

Type

conf

DOI

10.1109/ISCAS.2014.6865275

Filename

6865275