An ultra broadband GaAs MESFET preamplifier IC for a 10 Gb/s optical communication system

An ultra broadband GaAs MESFET preamplifier IC is developed for a 10 Gb/s optical communication system. High transimpedance of 44 dB Omega has been obtained for DC to 12 GHz. A receiver has been fabricated by using this preamplifier IC and a photodiode. The receiver operates with extremely low equivalent input noise current of 12.6 pA/ square root Hz for DC to 7.8 GHz. The authors describe the circuit design, the high frequency characteristics of the preamplifier IC, and the receiver.<
>