Title :
A CMOS differential transimpedance amplifier for gigabit optical communication
Author :
Kasemsuwan, Varakorn ; Hyungkeun Ahn
Abstract :
In this paper, a CMOS differential transimpedance amplifier is presented. The basic amplifier employs fT doubler and compensation capacitor techniques to enhance the bandwidth. 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 phantom zero introduced by the feedback network is used to position the pole in the desired region of the close loop systems. HSPICE is used to verify the circuit performance with a standard 0.5 mum CMOS technology and supply voltage of 2.5 V. Simulation results demonstrate the gain and the speed of operation of 80 dB and 3.25 Gb/s respectively. The equivalent input noise current spectral density is found to be 7.4 pAlradicHz at 1 GHz and the total power dissipation is 29.6 mW
Keywords :
CMOS integrated circuits; capacitors; closed loop systems; differential amplifiers; feedback; integrated optoelectronics; optical receivers; 0.5 mum; 1 GHz; 2.5 V; 29.6 mW; 3.25 Gbit/s; 80 dB; CMOS differential transimpedance amplifier; close loop system; compensation capacitor technique; feedback network; gigabit optical communication; noise current spectral density; optical receiver; shunt-shunt feedback configuration; Bandwidth; CMOS technology; Capacitors; Circuit noise; Differential amplifiers; Impedance; Optical amplifiers; Optical feedback; Optical fiber communication; Semiconductor optical amplifiers;
Conference_Titel :
Advanced Communication Technology, 2005, ICACT 2005. The 7th International Conference on
Conference_Location :
Phoenix Park
DOI :
10.1109/ICACT.2005.245851
