A kind of single power supply transimpedance preamplifier (TIA) for optical receiver is developed

using 0.5 μ m GaAs PHEMT process.The TIA has a measured -3 dB bandwidth of 9.5GHz

with transimpedance gain of 43.5±1.5dB Ω 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.