Single ended to differential MHEMT transimpedance amplifier with 66 dB-Ω differential transimpedance and 50 GHz bandwidth

In this paper, we demonstrate a single ended to differential transimpedance amplifier (TIA) with 66 dB/spl Omega/ transimpedance gain, a 50 GHz 3-dB bandwidth and up to 700 mVp-p differential output voltage, fabricated in a 6-inch MHEMT process. The state-of-the-art gain-bandwidth product of this amplifier (>3 THz), combined with its small chip size (1.9/spl times/1.1 mm/sup 2/), high sensitivity and low power consumption (<350 mW) demonstrate the capabilities of a lumped MHEMT TIA design to realize a low cost receiver for 40 Gb/s fiber optic communication systems.