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LED Driving Circuit Design of Ultrasonic Speaker System for Sign Board  

Lee, Kyung-Ryang (서울과학기술대학교 NID융합기술대학원)
Yeo, Sung-Dae (서울과학기술대학교 NID융합기술대학원)
Jang, Young-Jin (서울과학기술대학교 NID융합기술대학원)
Cha, Jae-Sang (서울과학기술대학교 NID융합기술대학원)
Kim, Jin-Tae (파이브텍)
Shin, Jae-Kwon (파이브텍)
Kim, Seong-Kweon (서울과학기술대학교 전자IT미디어공학과)
Publication Information
Journal of Satellite, Information and Communications / v.8, no.4, 2013 , pp. 17-20 More about this Journal
Abstract
In this study, we introduce an LED Driving circuit in order that the information state can indicate audio signal gain and radiate pattern of ultrasonic speaker system for a sign board. Ultrasonic speaker system decreases energy loss and transmits the sound farther. Ultrasonic speaker having such characteristics is useful in that it can be widely used in daily life. Additionally, Proposed LED circuit indicates the information state as linear LED brightness taken from interface of ultrasonic speaker system. Designed circuit is confirmed through $0.35{\mu}m$ CMOS process by Dong-bu.
Keywords
Ultrasonic Speaker; LED Control; Transducer;
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  • Reference
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