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采用0·5μmGaAsPHEMT工艺研制了一种单电源共栅电流模跨阻抗前置放大器(TIA).测量得到放大器-3dB带宽为7·5GHz,跨阻增益为45dBΩ;输入输出电压驻波比(VSWR)均小于2;等效输入噪声电流谱密度在14·3~22pA/Hz之间,平均值为17·2pA/Hz.在输入10Gb/s非归零(NRZ)伪随机二进制序列(PRBS)信号下,放大器输出眼图清晰,具有14ps的定时抖动和138mV的峰峰电压.
A single-supply common-mode current-mode transimpedance preamplifier (TIA) was developed using a 0.5μm GaAsPEMT process. The -3dB bandwidth of the amplifier was measured at 7.5GHz and the transimpedance gain was 45dBΩ. The input-output voltage standing wave ratio (VSWR) Are less than 2. The equivalent input noise current spectral density is between 14.3 and 22 pA / Hz with an average of 17.2 pA / Hz. After inputting 10 Gb / s non-return to zero (NRZ) pseudorandom binary sequence (PRBS) signal Under the amplifier output eye clear, with 14ps timing jitter and 138mV peak-to-peak voltage.