A Low-Noise Linear TIA With 42-GHz Bandwidth for Single-Ended Coherent Optical Receivers

IF 2.2 Q3 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE IEEE Solid-State Circuits Letters Pub Date : 2024-08-29 DOI:10.1109/LSSC.2024.3451966

Zhiyuan Cao;Xi Xiao;Ziyue Dang;Jin He

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Abstract

This letter demonstrates a low-noise linear transimpedance amplifier (TIA) for single-ended coherent optical receivers (ORXs) in 0.13-

$\mu $

m SiGe BiCMOS. The TIA achieves relatively low noise, excellent linearity, and approximately unchanged bandwidth (BW) within a wide gain dynamic range by employing a cascade structure of an improved shunt-feedback (SFB) high-

$R_{F}$

TIA Core optimized for high linearity and a variable-gain single-to-differential (VG-S2D) circuit with adjustable peaking. The measured results of the TIA exhibit 42-GHz −3-dB BW at 74-dB

$\Omega $

maximum transimpedance gain

$(Z_{T}) {_{,}}~37$

-dB gain dynamic range, 12.5-pA/

$\sqrt {\mathrm {(Hz)}}$

input reference noise (IRN) current density, and <3%> $2{^{{31}}} -1$ . The TIA draws 72-mA current from a 3.3-V voltage supply and takes up 1 mm2 of the chip area with all its testing pads.

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用于单端相干光接收器的 42 GHz 带宽低噪声线性 TIA

这封信展示了一种低噪声线性跨阻放大器（TIA），用于 0.13- $\mu $ m SiGe BiCMOS 单端相干光接收器（ORX）。该 TIA 采用改进型分路反馈 (SFB) 高 $R_{F}$ TIA 内核的级联结构，该内核针对高线性度进行了优化，同时还采用了具有可调峰值的可变增益单到差分 (VG-S2D) 电路，从而在宽增益动态范围内实现了相对较低的噪声、出色的线性度和大致不变的带宽 (BW)。TIA 的测量结果显示，在 74-dB $\Omega $ 最大跨导增益 $(Z_{T}) {_{,}}~37$ -dB 增益动态范围内，具有 42-GHz -3-dB BW、12.5-pA/ $\sqrt {\mathrm {(Hz)}}$ 输入参考噪声 (IRN) 电流密度和 $2{^{{31}} 。｝-1$ .TIA 采用 3.3 V 电压供电，电流为 72 mA，所有测试焊盘占用芯片面积为 1 mm2。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Solid-State Circuits Letters Engineering-Electrical and Electronic Engineering

CiteScore

4.30

自引率

3.70%

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