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A 3-Gb/s optical detector in standard CMOS for 850-nm optical communication

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3 Author(s)
Radovanovic, S. ; Dept. of Integrated Circuit Design, Univ. of Twente, Enschede, Netherlands ; Annema, A.-J. ; Nauta, B.

This paper presents a monolithic optical detector, consisting of an integrated photodiode and a preamplifier in a standard 0.18-μm CMOS technology. A data rate of 3 Gb/s at BER <10-11 was achieved for λ=850 nm with 25-μW peak-peak optical power. This data rate is more than four times than that of current state-of-the-art optical detectors in standard CMOS reported so far. High-speed operation is achieved without reducing circuit responsivity by using an inherently robust analog equalizer that compensates (in gain and phase) for the photodiode roll-off over more than three decades. The presented solution is applicable to various photodiode structures, wavelengths, and CMOS generations.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:40 ,  Issue: 8 )