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Proceedings Paper

0.18μm CMOS inductorless AGC amplifier with 50dB input dynamic range for 10GBase-LX4 ethernet
Author(s): F. Aznar; S. Celma; B. Calvo; C. Aldea
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Paper 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.

Paper Details

Date Published: 28 May 2009
PDF: 12 pages
Proc. SPIE 7363, VLSI Circuits and Systems IV, 73630T (28 May 2009); doi: 10.1117/12.821447
Show Author Affiliations
F. Aznar, Univ. of Zaragoza (Spain)
S. Celma, Univ. of Zaragoza (Spain)
B. Calvo, Univ. of Zaragoza (Spain)
C. Aldea, Univ. of Zaragoza (Spain)


Published in SPIE Proceedings Vol. 7363:
VLSI Circuits and Systems IV
Teresa Riesgo; Eduardo de la Torre; Leandro Soares Indrusiak, Editor(s)

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