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基于TSMC 65nm CMOS工艺,提出了一种低噪声、低功耗的10Gb/s光通信接收机跨阻前置放大器(TIA)设计。该TIA采用1.2V低电压供电,没有采用电感以大幅度减小芯片面积,可稳定工作于10Gb/s速率。当光电二极管电容为250f F时,电路的-3d B带宽为8.5GHz,跨阻增益66d B。平均等效输入电流谱密度约为16p A/√Hz(0~10GHz),总的等效输入噪声电流为1.2u A。该电路功耗为11.7m W,芯片面积仅为115um×120um。
Based on the TSMC 65nm CMOS process, a low noise and low power transimpedance preamplifier (TIA) design for 10Gb / s optical communication receiver is proposed. The TIA uses 1.2V low-voltage power supply, there is no inductor to significantly reduce the chip area, stable operation at 10Gb / s rate. When the photodiode capacitance is 250fF, the -3dB bandwidth of the circuit is 8.5GHz and the transimpedance gain is 66dB. The average equivalent input current spectral density is about 16p A / √Hz (0 ~ 10GHz) and the total equivalent input noise current is 1.2uA. The power consumption of this circuit is 11.7m W, the chip area is only 115um × 120um.