A highly linear, digitally programmable gain amplifier (PGA) based on an inherently linear MOS current divider (MCD) is presented in this paper. A 3-bit prototype with a total variation range of 36dB ...

A linear 56Gbaud PAM4 transimpedance amplifier (TIA) and a VCSEL-based driver are presented in this paper. It can meet the requirements of emerging 400G Ethernet. The equalizer technique is both ...