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首页> 外文期刊>IEEE Journal of Solid-State Circuits >A 3-Tap FIR Filter With Cascaded Distributed Tap Amplifiers for Equalization Up to 40 Gb/s in 0.18-μm CMOS
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A 3-Tap FIR Filter With Cascaded Distributed Tap Amplifiers for Equalization Up to 40 Gb/s in 0.18-μm CMOS

机译:具有级联分布式抽头放大器的3抽头FIR滤波器,可在0.18μmCMOS中实现高达40 Gb / s的均衡

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摘要

This paper describes a 3-tap finite impulse response programmable analog filter in 0.18-μm CMOS. The filter is intended for polarization-mode dispersion compensation in 40-Gb/s long-haul single-mode optical fiber links. A novel filter topology is employed, whereby each tap gain comprises a cascade of two distributed amplifiers with adjustable gain. The same lumped LC ladders that provide the 25-ps tap delays also serve as artificial transmission lines for the distributed tap amplifiers. The prototype is 1 mm × 1 mm (900 μm × 600 μm active area) and consumes up to 70 mW from a 1.8-V supply depending on the tap gains. Linear equalization is demonstrated over a channel with 17 dB of loss at 20 GHz. A 50 mV per side eye amplitude with 14 dB signal-to-noise ratio is demonstrated at 30 Gb/s, and a modest 39 mV per side eye amplitude with 10 dB signal-to-noise ratio is achieved at 40 Gb/s.
机译:本文介绍了一种在0.18μmCMOS中的3抽头有限脉冲响应可编程模拟滤波器。该滤波器用于40 Gb / s长距离单模光纤链路中的偏振模色散补偿。采用了一种新颖的滤波器拓扑结构,其中每个抽头增益包括两个具有可调增益的分布式放大器的级联。提供25ps抽头延迟的相同集总LC阶梯也可用作分布式抽头放大器的人工传输线。原型为1 mm×1 mm(900μm×600μm有效面积),根据抽头增益,从1.8V电源消耗的功率高达70 mW。在20 GHz下损耗为17 dB的信道上证明了线性均衡。在30 Gb / s时,每只侧眼振幅为50 mV,信噪比为14 dB,在40 Gb / s时,每只侧眼振幅为适度39 mV,信噪比为10 dB。

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