A 3 Gb/s 80 dB CMOS differential transimpedance amplifier for optical communication systems

Author

Pongpalit, Wacharapol ; Kasemsuwan, Varakorn ; Ahn, Hyungkeun

Author_Institution

Dept. of Electron., Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand

fYear

2005

fDate

23-26 May 2005

Firstpage

1614

Abstract

In this paper, a 3 Gbit/s 80 dB differential CMOS transimpedance amplifier is proposed. The shunt-shunt feedback configuration is used to compromise between the wide bandwidth of the low impedance design and the low noise performance of the high impedance design. The basic amplifier employs f_T doubler and compensation capacitor techniques to enhance the bandwidth. The phantom zero introduced by the feedback network is used to position the pole in any desired region of the closed loop systems. HSPICE is used to verify the circuit performance with a standard 0.5 μm CMOS technology and supply voltage of 2.5 V. Simulation results demonstrate the gain and the speed of operation of 80 dB and 3 Gb/s respectively. The equivalent input noise current spectral density is found to be 7.8 pA/(Hz) at 1 GHz and the total power dissipation is 58.4 mW.

Keywords

CMOS integrated circuits; closed loop systems; compensation; differential amplifiers; feedback amplifiers; integrated optoelectronics; optical communication equipment; optical fibre amplifiers; pole assignment; wideband amplifiers; 0.5 micron; 1 GHz; 2.5 V; 3 Gbit/s; 58.4 mW; CMOS transimpedance amplifier; circuit performance; closed loop systems; compensation capacitor; differential transimpedance amplifier; f_T doubler; feedback network; high impedance design; low impedance design; low noise performance; optical communication systems; pole; shunt-shunt feedback configuration; Bandwidth; CMOS technology; Capacitors; Differential amplifiers; Impedance; Optical amplifiers; Optical feedback; Optical fiber communication; Optical noise; Semiconductor optical amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on

Print_ISBN

0-7803-8834-8

Type

conf

DOI

10.1109/ISCAS.2005.1464912

Filename

1464912