A Passive Optical Transmitter Using LC Switches for IoT Smart Dusts

Jingjing Liu, Riqing Chen, Yuan Ren, Zhongting Xu, Guoqing Hu, Jun Pan, Chunlai Li, Jin He
October 2019
Cite Source Document DOI

Abstract

Using optical wireless communications for sensors enables low power and small size of the nodes, such as smart dusts. This paper proposes a passive optical transmitter for smart dusts. Two liquid crystal (LC) modulator circuits have been designed for the switching the liquid crystal cells in the transmitter. The circuits are fabricated using a standard 0.18 μm CMOS process. Measurement results show that they can work under 0.5 V supply and successfully do the switching as designed. The transmission data rate can be 10 bps, which is limited by the response speed of the LC cell.

Type
Conference paper
Publication
In 2019 IEEE Canadian Conference of Electrical and Computer Engineering (CCECE), 2019, pp. 1-4.
Jingjing Liu
Jingjing Liu
Associate Professor

My research interests include low-power smart micro-sensor integrated circuit design, image sensors, biomedical sensors, and energy harvesting circuits.