用于25gb /s多模光纤接收机的28nm CMOS FDSOI低噪声可编程增益放大器

ESSCIRC Conference 2015 - 41st European Solid-State Circuits Conference (ESSCIRC) Pub Date : 2015-11-02 DOI:10.1109/ESSCIRC.2015.7313853

F. Radice, M. Bruccoleri, E. Mammei, M. Bassi, A. Mazzanti

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引用次数: 2

摘要

宽带宽、低噪声、高增益、可调性好是应用于多模光纤(MMF)接收机的可编程增益放大器(PGA)的主要特点。奈奎斯特的高频升压也可以部分恢复ISI和放松对电子色散补偿的要求。本文提出了一种用于25Gb/s MMF接收机的PGA。级联级之间的并联和串联电感可以实现与带内增益无关的可编程高频升压，并具有明显的带外滚降。与典型的rc退化增益级相比，采用的解决方案可以实现非常低的噪声操作。采用28nm CMOS FDSOI技术实现的PGA具有15dB至29dB的可编程增益范围，具有0.15 dB的精细步进和在奈奎斯特频率下高达14.2dB的升压。功耗为32mW，在最大高频升压下，等效输入噪声仅为300μVrms。

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A low-noise programmable-gain amplifier for 25 Gb/s multi-mode fiber receivers in 28nm CMOS FDSOI

Wide bandwidth, very low noise and high gain, finely adjustable, are key features in programmable-gain amplifiers (PGA) employed in multi-mode fiber (MMF) receivers. High frequency boost at Nyquist is also desirable to partially recover ISI and relax the requirements of electronic dispersion compensation. In this work, a PGA for 25Gb/s MMF receivers is proposed. Shunt and series inductors between cascaded stages are exploited to achieve programmable high-frequency boost independent from in-band gain and with a sharp out-of-band roll-off. Compared to typical RC-degenerated gain stages, the adopted solution enables very low noise operation. Realized in 28nm CMOS FDSOI technology the PGA has a programmable gain ranging from 15dB to 29dB with 0.15 dB fine steps and up to 14.2dB boost at Nyquist frequency. Power consumption is 32mW and equivalent input noise, at maximum high-frequency boost, is 300μVrms only.

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ESSCIRC Conference 2015 - 41st European Solid-State Circuits Conference (ESSCIRC)

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