An InGaAs-InPHBT differential transimpedance amplifier with 47-GHz bandwidth
01 October 2004
Return-to-zero differential phase-shift keying applications require a differential amplifier with high bandwidth, high gain, low noise, and good input impedance match. In this paper, we describe an InGaAs-InP heterostructure bipolar transistor differential transimpedance amplifier with high bandwidth of 47 GHz and high gain of 56 dB-Omega. The input-referred current noise is less than 35 pA/rootHz over the measurement range up to 40 GHz.