20 Gbit/s photoreceivers have been realised by cascading three distributed pre-amplifiers purposely designed and processed with a GaAs PHEMT 0.2 µm gate length technology. The bandwidth is 16 GHz, and an average equivalent input noise as low as 12 pA/√Hz up to 14 GHz is obtained. The transimpedance is 63 dBΩ.
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Legros et al. (1996) studied this question.
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