光通信技术2019，Vol.43Issue(2)：22-26,5.DOI:10.13921/j.cnki.issn1002-5561.2019.02.005
可见光通信LED高速驱动电路研究与设计
Research and design of high-speed drive circuit for LED in visible light communication
夏中金 1凌六一 1黄家伟 1吕旻姝 1袁枫1
作者信息
- 1. 安徽理工大学 电气与信息工程学院,安徽 淮南 232001
- 折叠
摘要
Abstract
In the visible light communication system, the carriers that remain on the junction capacitance of LED when the LED is turned off greatly limit the modulation rate of the LED. This paper studies a new LED drive circuit that can remove residual carriers on the junction capacitance when the LED is turned off. Through connecting a triode with both ends of LED, and turning on it when the LED is turned off, the LED is become short-circuit to quickly remove the residual carriers on both ends of the LED; and through turning off the triode when the LED is turned on, the normal drive of LED can be ensured. Taking 1 MHz square-wave signal as the signal source, the optical signal emitted by the LED is detected by the FDS100 photoelectric detector, and the circuit is tested through two different LED bands of blue (460 nm center wavelength) and purple (400 nm center wavelength). The experimental results show that the new LED drive circuit can effectively improve the modulation rate of a single LED.关键词
可见光通信/LED/驱动电路/调制速率Key words
visible light communication/LED/driving circuit/modulation rate分类
信息技术与安全科学引用本文复制引用
夏中金,凌六一,黄家伟,吕旻姝,袁枫..可见光通信LED高速驱动电路研究与设计[J].光通信技术,2019,43(2):22-26,5.
