Title :
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
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;
Conference_Titel :
Circuits and Systems (ISCAS), 2014 IEEE International Symposium on
Conference_Location :
Melbourne VIC
Print_ISBN :
978-1-4799-3431-7
DOI :
10.1109/ISCAS.2014.6865275
