QTIA, a 2.5 or 10 Gbps 4-Channel Array Optical Receiver ASIC in a 65 nm CMOS Technology

H. Sun; X. Huang; C. -P. Chao; S. -W. Chen; B. Deng; D. Gong; S. Hou; G. Huang; S. Kulis; C. -Y. Li; C. Liu; T. Liu; P. Moreira; Q. Sun; J. Ye; L. Zhang; W. Zhang

doi:10.1088/1748-0221/17/05/c05017

arXiv · 2110.12626

QTIA, a 2.5 or 10 Gbps 4-Channel Array Optical Receiver ASIC in a 65 nm CMOS Technology

H. Sun·X. Huang·C. -P. Chao·S. -W. Chen·B. Deng·D. Gong·S. Hou·G. Huang·S. Kulis·C. -Y. Li·C. Liu·T. Liu·P. Moreira·Q. Sun·J. Ye·L. Zhang·W. Zhang

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Abstract

The Quad transimpedance and limiting amplifier (QTIA) is a 4-channel array optical receiver ASIC, developed using a 65 nm CMOS process. It is configurable between the bit rate of 2.56 Gbps and 10 Gbps per channel. QTIA offers careful matching to both GaAs and InGaAs photodiodes. At this R&D stage, each channel has a different biasing scheme to the photodiode for optimal coupling. A charge pump is implemented in one channel to provide a higher reverse bias voltage, which is especially important to mitigate radiation effects on the photodiodes. The circuit functions of QTIA successfully passed the lab tests with GaAs photodiodes.

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H. Sun, X. Huang, C. -P. Chao, S. -W. Chen, B. Deng, D. Gong, S. Hou, G. Huang, S. Kulis, C. -Y. Li, C. Liu, T. Liu, P. Moreira, Q. Sun, J. Ye, L. Zhang, W. Zhang. 2021-10-25. QTIA, a 2.5 or 10 Gbps 4-Channel Array Optical Receiver ASIC in a 65 nm CMOS Technology. https://doi.org/10.1088/1748-0221%2F17%2F05%2Fc05017

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