| Citation: |
Jiao Shilong, Yang Xianming, Zhao Liang, Li Hui, Chen Zhenlong, Chen Tangsheng, Shao Kai, Ye Yutang. A 10Gb/s GaAs PHEMT High Gain Preamplifier for Optical Receivers[J]. Journal of Semiconductors, 2007, In Press.
Jiao S L, Yang X M, Zhao L, Li H, Chen Z L, Chen T S, Shao K, Ye Y T. A 10Gb/s GaAs PHEMT High Gain Preamplifier for Optical Receivers[J]. Chin. J. Semicond., 2007, 28(12): 1902.
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A 10Gb/s GaAs PHEMT High Gain Preamplifier for Optical Receivers
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Abstract
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 213dB 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.-
Keywords:
- GaAs PHEMT,
- optical receiver,
- preamplifier,
- eye diagram,
- cascade
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References
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