0.18µm CMOS inductorless AGC amplifier with 50dB input dynamic range for 10GBase-LX4 ethernet

F. Aznar; S. Celma; B. Calvo; C. Aldea

doi:10.1117/12.821447

28 May 2009 0.18μm CMOS inductorless AGC amplifier with 50dB input dynamic range for 10GBase-LX4 ethernet

F. Aznar, S. Celma, B. Calvo, C. Aldea

Proceedings Volume 7363, VLSI Circuits and Systems IV; 73630T (2009) https://doi.org/10.1117/12.821447
Event: SPIE Europe Microtechnologies for the New Millennium, 2009, Dresden, Germany

Abstract

This paper presents a new automatic gain control main amplifier for 10GBase-LX4 Ethernet realized in a 0.18 μm CMOS process. The proposed optical-fiber differential post-amplifier is based on a very compact inductorless design which comprises three main digitally programmable gain stages followed by a buffer. It is characterized by a -3 dB cutoff frequency above 3 GHz over a -3 to 33 dB linear-in-dB gain control. It includes a DC offset cancellation network and an automatic gain control loop which establishes a setting time below 1μs. Results show a sensitivity of 2.1 mV for BER = 10^-12 and an input dynamic range above 50 dB. The power consumption is 58 mW at a single supply voltage of 1.8 V.

Citation Download Citation

F. Aznar, S. Celma, B. Calvo, and C. Aldea "0.18μm CMOS inductorless AGC amplifier with 50dB input dynamic range for 10GBase-LX4 ethernet", Proc. SPIE 7363, VLSI Circuits and Systems IV, 73630T (28 May 2009); https://doi.org/10.1117/12.821447

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