CAJ | 학술논문

基于南京电子器件研究所0.5μm GaAs PHEMT工艺,研制了一种高增益级联式光接收机前置放大器.作为前级的跨阻抗放大器的-3dB带宽为10GHz,小信号增益为9dB;作为后级的分布式放大器的-3dB带宽接近20GHz,小信号增益为12dB;级联前置放大器小信号增益达21.3dB,跨阻增益为55.3dBΩ,在输入10Gb/s非归零伪随机二进制序列下,放大器输出眼图清晰、对称、信噪比优于跨阻放大器,分布放大器不能校正的输入波形失真也得到显著改善.
기우남경전자기건연구소0.5μm GaAs PHEMT공예,연제료일충고증익급련식광접수궤전치방대기.작위전급적과조항방대기적-3dB대관위10GHz,소신호증익위9dB;작위후급적분포식방대기적-3dB대관접근20GHz,소신호증익위12dB;급련전치방대기소신호증익체21.3dB,과조증익위55.3dBΩ,재수입10Gb/s비귀령위수궤이진제서렬하,방대기수출안도청석、대칭、신조비우우과조방대기,분포방대기불능교정적수입파형실진야득도현저개선.
A high gain cascade connected preamplifier for optical receivers is developed with 0.5μm GaAs PHEMT technology from the Nanjing Electronic Devices Institute.To begin with,the transimpedance amplifier has a -3dB bandwidth of 10GHz,with a small signal gain of around 9dB.The post-stage distributed amplifier (DA) has a -3dB bandwidth of close to 20GHz,with a small signal gain of around 12dB.As a whole,the cascade preamplifier has a measured small signal gain of 21.3dB and a transimpedance of 55.3dBΩ in a 50Ω system.With a higher signal-to-noise ratio than that of the TIA and a markedly improved waveform distortion compared with that of the DA,the measured output eye diagram for 10Gb/s NRZ pseudorandom binary sequence is clear and symmetric.