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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Mirvakili, A. Joyner, V. |
| Copyright Year | 2010 |
| Description | Author affiliation: Department of Electrical and Computer Engineering, Tufts University, Medford, MA 02155 (Mirvakili, A.; Joyner, V.) |
| Abstract | Recent breakthroughs in solid-state lighting technology has opened the door to a myriad of applications using light-emitting diodes for both illumination and optical wireless networking. Low-power CMOS technology enables realization of mixed-mode, system-on-chip driver circuits integrating multiple functions on a single substrate to control LED device performance, luminance, and data modulation for “intelligent” visible light networking. This paper presents a novel LED driver circuit architecture incorporating digitally-controlled analog circuit blocks to deliver concurrent illumination control and serial data transmission. To achieve this goal, a bi-level pulse-width modulation (PWM) driving scheme is applied to enable data transmission during the “OFF” period of the LED drive current. With 3-bit PWM dimming resolution, the driver circuit enables linear luminous intensity control from 5% to 100%. Pseudo-random binary sequences (PRBS) are generated to compare circuit performance for various data modulation formats. The LED driver circuit is simulated in a 0.5µm CMOS process and exhibits a worst-case power consumption of 100mW with 33mA peak PWM current. |
| Starting Page | 1067 |
| Ending Page | 1071 |
| File Size | 115956 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781424488636 |
| e-ISBN | 9781424488650 |
| DOI | 10.1109/GLOCOMW.2010.5700098 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-12-06 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Wireless communication PWM dimming Optical Wireless Pulse width modulation Light emitting diodes Visible Light Communication CMOS integrated circuits Data communication Synchronization LED driver Driver circuits |
| Content Type | Text |
| Resource Type | Article |
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