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-Ω. The input-referred current noise is less than 35 pA/√Hz over the measurement range up to 40 GHz.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
- Indium phosphide (INP)
- Monolithic microwave integrated circuit (MMIC)
- Opto-electronic integrated circuit (OEIC)
- Transimpedance amplifier (TIA)