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10-GHz Si bipolar amplifier and mixer ICs for coherent optical systems

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7 Author(s)
T. Okamura ; NEC Corp., Kawasaki, Japan ; C. Kurioka ; Y. Kuraishi ; O. Tsuzuki
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Using a 30-GHz fT silicon bipolar process, 10-GHz amplifier and mixer ICs for a multigigabit-per-second coherent optical-fiber communication system were fabricated. The dual-feedback amplifier with triple Darlington achieves a 10-GHz bandwidth and 20-dB gain. The Gilbert-cell mixer operates up to 10 GHz with a 10-dB conversion loss. The simulation technique, used for the design of these ICs includes an improved interconnect line model for the high-frequency region. The 10-GHz amplifier has a 1-mm2 chip size and 210-mW power dissipation. The mixer has 2-mm2 chip size and 550-mW power dissipation

Published in:

IEEE Journal of Solid-State Circuits  (Volume:27 ,  Issue: 12 )