摘要
文章利用CMOS工艺,设计一种用于SDH STM-4速率级(622 Mbit/s)光纤用户网的光接收机限幅放大器。此电路通过直接耦合技术来提高增益、降低功耗;通过多级级联来提高增益,并通过采用有源电感负载来增加带宽,稳定电路直流工作点;并采用商用Smart Spice电路仿真软件和CSMC-HJ 0.6μm工艺参数对该电路进行仿真;结果表明,该电路在从4～500 mV,即42 dB的动态输入范围内,50Ω负载上双端输出电压摆幅稳定在680 mV。
A limiting amplifier for the STM-4（622 Mbit/s） optical receiver in the SDH system is realized by native CMOS technology. The direct coupling technique is used to increase the voltage gain and reduce power dissipation, the multilevel coupling technique is used to increase the voltage gain, and active inductors are employed as loads to expand the bandwidth and get the stable DC operation point. Simulation of the circuit is carried out by adopting the software Smart Spice and CSMC-HJ 0.6μm standard CMOS technologic parameters. Simulation results show that the amplifier exhibits an input dynamic range of 42 dB（from 4 mV to 500 mV） and an approximately constant double-end output voltage swing of 680 mV over a load of 50 Ω.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第8期943-945,共3页
Journal of Hefei University of Technology：Natural Science
关键词
光接收机
限幅放大器
有源电感
直接耦合
optical receiver
limiting amplifier
active inductor
direct coupling
