Gudyriev, Sergiy, et al. “Fully-Differential, Hybrid, Multi-Channel 4Gbps Direct Direction Receiver in 0.25xtmum BiCMOS SiGe Technology.”https://doi.org/10.1364/FIO.2017.FM3A.3__OSA Frontiers in Optics + Laser Science, 2017, doi:https://doi.org/10.1364/FIO.2017.FM3A.3.