State-of-the-art 60 GHz, 3.6 k-ohm transimpedance amplifier for 40 Gb/s and beyond

A 3.6 k/spl Omega/ InP HBT transimpedance amplifier (TIA) has been demonstrated with a bandwidth of 60 GHz. Gain flatness of /spl plusmn/2 dB and DC power of 271 mW has also been obtained. This TIA benchmarks the best gain-bandwidth product (GBP) of 1.9 THz, the highest transimpedance-bandwidth product (TZ-BWP) of 216 /spl Omega/-THz, and the highest TZ-BWP per DC power efficiency of +797 /spl Omega/-GHz/mW obtained for a 40 Gb/s transimpedance amplifier. These results are discussed in context with prior state-of-the-art 40 Gb/s TIAs implemented with various technologies and circuit topologies. 40 Gb/s photo-receiver requirements, TIA technology and topology trades, and future directions are reviewed.