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.
@article{arxiv.2110.12626,
title = {QTIA, a 2.5 or 10 Gbps 4-Channel Array Optical Receiver ASIC in a 65 nm CMOS Technology},
author = {H. Sun and X. Huang and C. -P. Chao and S. -W. Chen and B. Deng and D. Gong and S. Hou and G. Huang and S. Kulis and C. -Y. Li and C. Liu and T. Liu and P. Moreira and Q. Sun and J. Ye and L. Zhang and W. Zhang},
journal= {arXiv preprint arXiv:2110.12626},
year = {2022}
}
Comments
6 pages, 6 figures, accepted for publication in JINST (TWEPP2021)