A 20 Gb/s CMOS Optical Receiver With Limited-Bandwidth Front End and Local Feedback IIR-DFE.

Implementation of highly integrated optical receivers in CMOS promises low cost, but combining high gain, low noise, high bandwidth, and low power in a CMOS transimpedance amplifier is a challenge. Fortunately, the sensitivity of an optical receiver is improved by limiting its frontend bandwidth far below the symbol rate and using equalization to eliminate the resulting intersymbol interference (I...