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Optical receiver in deep-sub-micrometre CMOS with -28.2 dBm sensitivity at 1.25 Gbit/s

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3 Author(s)
Schneider, K. ; Inst. for Electr. Meas.s & Circuit Design, Vienna Univ. of Technol., Austria ; Zimmermann, H. ; Wiesbauer, A.

A transimpedance amplifier (TIA) as preamplifier for optical receivers in passive optical networks designed in a digital 120 nm CMOS technology is described. Varying the open-loop gain of the preamplifier by a factor of 340 is suggested as a solution for the stability problem of this variable gain TIA. Sensitivities of -29.9 dBm at 622 Mbit/s and -28.2 dBm at 1.25 Gbit/s with 1.3 μm light and a bit error ratio of 10-10 are achieved.

Published in:

Electronics Letters  (Volume:40 ,  Issue: 4 )