A fully integrated inductorless AGC amplifier for optical gigabit ethernet in 0.18 μm CMOS

Author

Aznar, F. ; Celma, S. ; Calvo, B. ; Digón, D.

Author_Institution

Group of Electron. Design (I3A), Univ. of Zaragoza, Zaragoza

fYear

2008

fDate

June 30 2008-July 2 2008

Firstpage

1662

Lastpage

1667

Abstract

This paper presents a new automatic gain control amplifier for 10GBase-LX4 Ethernet realized in a standard 0.18 mum CMOS process. The proposed differential post-amplifier, based on a very compact inductorless design, comprises three cascaded digitally programmable gain stages followed by a buffer. To enhance bandwidth, inverse scaling is used for the second stage, while the negative capacitances technique is used in the third stage. Post-layout simulation results show an overall -3 dB cutoff frequency above 2.7 GHz over a -2.4 to 32.1 dB linear-in-dB gain control. The power consumption is 54 mW at a single supply voltage of 1.8 V.

Keywords

CMOS integrated circuits; automatic gain control; local area networks; optical fibre networks; wideband amplifiers; 0.18 mum CMOS; 10GBase-LX4 Ethernet; automatic gain control amplifier; fully integrated inductorless AGC amplifier; gain -2.4 dB to 32.1 dB; negative capacitances technique; optical gigabit Ethernet; power 54 mW; power consumption; voltage 1.8 V; Bandwidth; CMOS process; Capacitance; Ethernet networks; Gain control; Integrated optics; Optical amplifiers; Optical buffering; Semiconductor optical amplifiers; Stimulated emission;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 2008. ISIE 2008. IEEE International Symposium on

Conference_Location

Cambridge

Print_ISBN

978-1-4244-1665-3

Electronic_ISBN

978-1-4244-1666-0

Type

conf

DOI

10.1109/ISIE.2008.4677122

Filename

4677122