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12 Gb/s CaAs PHEMT Transimpedance Preamplifier for Optical Receiver

Shilong Jiao, Wei Feng

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Abstract

A kind of single power supply transimpedance preamplifier(TIA) for optical receiver is developed,using 0.5μm GaAs PHEMT process.The TIA has a measured-3 dB bandwidth of 9.5GHz,with transimpedance gain of 43.5±1.5dBΩ in the range of 50MHz～7.5GHz.The return losses of input and output ports are both less than-10dB.The noise figure(NF) varies from 4dB to 6.5dB within the bandwidth,while the calculated minimal equivalent input noise current density is about 17.6pA/H_z.The measured output eye diagram for 12Gb/s NRI pseudorandom binary sequence is clear and satisfying.

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What this paper is about

A kind of single power supply transimpedance preamplifier(TIA) for optical receiver is developed,using 0.5μm GaAs PHEMT process.The TIA has a measured-3 dB bandwidth of 9.5GHz,with transimpedance gain of 43.5±1.5dBΩ in the range of 50MHz～7.5GHz.The return losses of input and output ports are both less than-10dB.The noise figure(NF) varies from 4dB to 6.5dB within the bandwidth,while the calculated minimal equivalent input noise current density is about 17.6pA/H_z.The measured output eye diagram for 12Gb/s NRI pseudorandom binary sequence is clear and satisfying.

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Available abstract

A kind of single power supply transimpedance preamplifier(TIA) for optical receiver is developed,using 0.5μm GaAs PHEMT process.The TIA has a measured-3 dB bandwidth of 9.5GHz,with transimpedance gain of 43.5±1.5dBΩ in the range of 50MHz～7.5GHz.The return losses of input and output ports are both less than-10dB.The noise figure(NF) varies from 4dB to 6.5dB within the bandwidth,while the calculated minimal equivalent input noise current density is about 17.6pA/H_z.The measured output eye diagram for 12Gb/s NRI pseudorandom binary sequence is clear and satisfying.

Key concepts: Transimpedance amplifier, Preamplifier, Physics, Pseudorandom binary sequence, Electrical engineering, Bandwidth (computing), High-electron-mobility transistor, Noise figure

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