一种适用于10gb /s光链路的宽动态范围高增益带宽产品透阻放大器

The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology Pub Date : 2012-04-19 DOI:10.1109/MMWCST.2012.6238125

Fan Jiang, Jianwu Chen, Danyu Wu, Jin Wu, Zhi Jin, Xinyu Liu

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引用次数: 2

摘要

提出了一种基于WIN公司1μm GaAs工艺的高增益带宽积宽动态范围跨阻放大器(TIA)的设计方法和实现方法。宽动态范围源于并联反馈结构的利用，当输入电流较大时，并联反馈结构可将输入电流分开。高GBW是基于改进的Cherry-Hopper放大器作为增益级的限制放大器(LA)。该TIA的最大输入电流为3.5 mA，通阻为68.6 dBΩ，带宽为10.9 GHz。

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A wide dynamic range transimpedance amplifier with high gain-bandwidth product for 10 Gb/s optical links

This paper presents the design method and implementation of a wide dynamic range transimpedance amplifier (TIA) with high gain-bandwidth product (GBW) based on 1μm GaAs process of WIN company. The wide dynamic range results from the utilization of a parallel feedback structure that divides the input current when it is large. And the high GBW owes to the limiting amplifier (LA) which functions as a gain stage based on a modified Cherry-Hopper amplifier. The proposed TIA achieves a maximum input current of 3.5 mA and a transimpedance of 68.6 dBΩ and a bandwidth of 10.9 GHz.

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The 2012 International Workshop on Microwave and Millimeter Wave Circuits and System Technology

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