A Low-Power CMOS Trans-Impedance Amplifier for 2.5 Gb/S Optical Communication Systems

This Paper presents a new Trans-impedance amplifier for optical receiver circuits. The amplifier is based on parallel (R-C) feedback topology which is optimized for power consumption and uses shunt-peaking technique to enhance the frequency bandwidth of the amplifier. However، the circuit is designed and simulated using 0. 18µm CMOS technology parameters. As simulation results show، the amplifier has a gain of 67. 5dBΩ، bandwidth of 3GHz while consumes only 12. 16 mW power which shows a very good performance for using in a 2. 5Gb/S (SONET OC-48) optical communication system. Finally، as the simulated Eye-Diagram shows، the circuit has a very good performance for a 2. 5Gb/S system for a 10µA input current.