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Proceedings Paper

CMOS 155-Mb/s optical wireless transmitter for indoor networks
Author(s): David M. Holburn; Robert J. Mears; Rina J. Samsudin; Valencia M. Joyner; Vinod A. Lalithambika
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Paper Abstract

12 A 155 Mb/s CMOS LED driver for low-cost optical wireless links is presented. The driver is realized in a 0.7 micrometers commodity mixed-signal CMOS process from Alcatel Microelectronics. The driver employs switching transistors which drive a current mirror to generate modulation current. The circuit also contains a controllable quiescent current source. The transmitter driver incorporates two novel features: adjustable current peaking and adjustable charge extraction. These functions are implemented with the use of original timing generators. Simulations indicate that the design achieves output rise times and fall times of less than 2 ns. Other design parameters were selected to suit the requirements of the InP resonant cavity LED that was developed for this application.

Paper Details

Date Published: 6 February 2001
PDF: 9 pages
Proc. SPIE 4214, Optical Wireless Communications III, (6 February 2001); doi: 10.1117/12.417503
Show Author Affiliations
David M. Holburn, Univ. of Cambridge (United Kingdom)
Robert J. Mears, Univ. of Cambridge (United Kingdom)
Rina J. Samsudin, Univ. of Cambridge (United Kingdom)
Valencia M. Joyner, Univ. of Cambridge (United Kingdom)
Vinod A. Lalithambika, Univ. of Cambridge (United Kingdom)

Published in SPIE Proceedings Vol. 4214:
Optical Wireless Communications III
Eric J. Korevaar, Editor(s)

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