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An 11.1 Gbps Analog PRML Receiver for Electronic Dispersion Compensation of Fiber Optic Communications

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11 Author(s)
Elahmadi, S. ; Menara Networks Inc., Dallas, TX, USA ; Bussmann, M. ; Baranauskas, D. ; Zelenin, D.
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A dispersion tolerant receiver for fiber-optic links, in 0.18 μm SiGe BiCMOS, implements a Class-2 partial response maximum likelihood (PRML) equalization entirely in the analog domain. Post-FEC error free operation is achieved with data received from over 400 Km of uncompensated single mode fiber (SMF). The 4.5 W ASIC operates at up to 11.1 Gb/s and includes a variable gain amplifier (VGA) with automatic gain control (AGC), a 1.5-3.5 GHz programmable continuous-time filter (CTF), a 5-tap sampled-time finite-impulse response (FIR) filter, a decision directed timing recovery, and a 4-state analog Viterbi detector implementation. The receiver is compliant with XFI jitter specifications for Telecom applications (SONET OC-192 and G.709 “OTU-2”).

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:45 ,  Issue: 7 )

Date of Publication:

July 2010

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