High Sensitivity and Dynamic-Range 25 GBaud Silicon Receiver

This chapter presents a high sensitivity 25 GBaud optical receiver front-end including CMOS transimpedance amplifier and Ge-on-Si photodetector. In the electrical section, a configurable DC current bypass is proposed to achieve automatic gain control with high linearity to minimize the introduced noise and improve the stability of the loop. Also, a photodetector with a cubic Ge is proposed to improve the response speed.