In this paper, a new low-power optical receiver front-end is proposed in 90 nm CMOS technology for 5 Gb/s AApplications. However, to improve the gain-bandwidth trade-off, the proposed Trans-Impedance Amplifier (TIA) uses an active modified inverter-based topology followed by a common-source amplifier, which uses active inductive peaking technique to enhance the frequency bandwidth in an increased gain level for a reasonable power consumption value. The proposed TIA is analyzed and simulated in HSPICE using 90 nm CMOS technology parameters. Simulation results show a 53.5dBΩ trans-impedance gain, 3.5 GHz frequency bandwidth, 16.8pA/√Hz input referred noise, and 1.28 mW of power consumption at 1V supply voltage. The Optical receiver is completed using three stages of differential limiting amplifiers (LAs), which provide 27 dB voltage gain while consume 3.1 mW of power. Finally, the whole optical receiver front-end consumes only 5.6 mW of power at 1 V supply and amplifies the input signal by 80 dB, while providing 3.7 GHz of frequency bandwidth. Finally, the simulation results indicate that the proposed optical receiver is a proper candidate to be used in a low-power 5 Gbps optical communication system.

在本文中，针对5 Gb / s AApplications，提出了一种采用90 nm CMOS技术的新型低功耗光接收器前端。但是，为了改善增益带宽的折衷，建议的跨阻抗放大器（TIA）使用有源的基于反相器的改进型拓扑，其后是共源放大器，后者使用有源的电感峰化技术来增强频率带宽。增加增益水平以获得合理的功耗值。使用90 nm CMOS技术参数在HSPICE中对拟议的TIA进行了分析和仿真。仿真结果表明，在1V电源电压下，跨阻增益为53.5dBΩ，带宽为3.5 GHz，输入参考噪声为16.8pA /√Hz，功耗为1.28 mW。光接收器使用三级差分限幅放大器（LA）完成，它提供27 dB的电压增益，同时消耗3.1 mW的功率。最终，整个光接收器前端在1 V电源下仅消耗5.6 mW的功率，并将输入信号放大80 dB，同时提供3.7 GHz的频率带宽。最后，仿真结果表明，所提出的光接收器是在低功率5 Gbps光通信系统中使用的合适候选者。