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A 10 Gb/s noise-canceled transimpedance amplifier for optical communication receivers
Analog Integrated Circuits and Signal Processing ( IF 1.4 ) Pub Date : 2019-10-14 , DOI: 10.1007/s10470-019-01546-3
Seyed Ruhallah Qasemi , Maryam Rafati , Parviz Amiri

This study presents a noise-canceled transimpedance amplifier (TIA) for optical receivers. The proposed structure consists of a shunt feedback common source amplifier as an input stage followed by two regulated cascodes (RGC) and finally a differential to the single-ended amplifier at the output stage. By exploiting the noise-canceling technique at the input stage, 31.8% of the total output noise is canceled. In addition, the auxiliary path’s RGC circuit, as it has a low input impedance, is utilized to cancel out the photodiode (PD) large parasitic capacitance at the input stage. The proposed TIA along with post amplifiers, including packaging components, are simulated in TSMC 90 nm RF CMOS technology at the post-layout level. The TIA average input-referred current noise is equal to \(9.5\;{\text{pA}}/\sqrt {\text{Hz}}\). The PD capacitance is considered as 325 fF for all simulations. The transimpedance gain is equal to 60 dBΩ and the 3-dB bandwidth is equal to 7 GHz. The power consumption of the proposed TIA is 3.6 mW from a 1.2 V supply voltage. The TIA occupies a chip area of 0.036 mm2.

中文翻译:

用于光通信接收器的10 Gb / s噪声消除跨阻放大器

这项研究提出了一种用于光接收器的噪声消除跨阻放大器(TIA)。所提出的结构包括一个并联反馈共源放大器作为输入级,然后是两个稳压共源共栅(RGC),最后是输出级与单端放大器的差分。通过在输入级采用噪声消除技术,可以消除总输出噪声的31.8%。此外,由于辅助路径的RGC电路具有低输入阻抗,因此可用来抵消输入级的光电二极管(PD)的大寄生电容。拟议的TIA和后置放大器,包括封装组件,在台积电90纳米RF CMOS技术的后布局级别上进行了仿真。TIA平均输入参考电流噪声等于\(9.5 \; {\ text {pA}} / \ sqrt {\ text {Hz}} \)。在所有模拟中,PD电容均被视为325 fF。跨阻增益等于60dBΩ,而3-dB带宽等于7 GHz。从1.2 V电源电压开始,建议的TIA的功耗为3.6 mW。TIA占据0.036 mm 2的芯片面积。
更新日期:2020-01-04
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