Abstract
In this study, we introduce an LED Driving circuit in order that the information state can indicate audio signal gain andradiate pattern of ultrasonic speaker system for a sign board. Ultrasonic speaker system decreases energy loss and transmitsthe 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 ultrasonicspeaker system. Designed circuit is confirmed through 0.35 µm CMOS process by Dong-bu.
Additionally, Proposed LED circuit indicates the information state as linear LED brightness taken from interface of ultrasonicspeaker system. Designed circuit is confirmed through 0.35 µm CMOS process by Dong-bu.
| Translated title of the contribution | LED Driving Circuit Design of Ultrasonic Speaker System for Sign Board |
|---|---|
| Original language | Korean |
| Pages (from-to) | 17-20 |
| Number of pages | 4 |
| Journal | 통신위성우주산업연구회논문지 |
| Volume | 8 |
| Issue number | 4 |
| State | Published - Dec 2013 |