RGB LED Driver Circuit Design for an Optical Fiber Sensor System

• Published in: ECTI Transactions on Computer and Information Technology Vol. 11; no. 2; pp. 163 - 177
• Main Authors: Grout, Ian A., Zaidi, Muhaned, Sterckx, Karel L., Bin A'ain, Abu Khari
• Format: Journal Article
• Language: English
• Published: 11.12.2017
• ISSN: 2286-9131; 2286-9131
• DOI: 10.37936/ecti-cit.2017112.63707

In this paper, the design of a programmable mixed-signal electronic circuit to control the light output of a red-green-blue (RGB) light emitting diode (LED) to be used in an optical fiber sensor system is presented and discussed. The LED is to be used as a light transmitter (light source) within the sensor system. The output of each LED color is to be independently controlled using either a d.c. current or a pulse width modulation (PWM) encoded current. The idea for, and architecture of, the mixed-signal electronic circuit design is considered as both a discrete implementation using off-the-shelf components and the concept for an application specific integrated circuit (ASIC) solution using a 0.35 µm complementary metal oxide semiconductor (CMOS) fabrication process. In this paper, the design operation principles, circuit architecture, simulation results and hardware requirements for this LED driver circuit are considered.