A 11-pA/Hz 5-Gb/s Inductorless Optical Receiver for High-Density Parallel Interface Application

IF 3.4 0 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE microwave and wireless technology letters Pub Date : 2025-04-28 DOI:10.1109/LMWT.2025.3553931

Wentao Zhong;Ang Hu;Jingsong Cui;Qin Hu;Dongsheng Liu;Xuecheng Zou

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引用次数: 0

Abstract

This letter presents a 5-Gb/s inductorless optical receiver (ORX) used for high-density parallel interface application. In order to reduce the active area of single channel and mitigate the magnetic coupling effect, the on-chip inductor is limit-used. By adopting a regulated cascode (RGC) transimpedance amplifier (TIA) and an on-chip low dropout (LDO) regulator, the high-frequency noise and off-chip noise are reduced. A limiting amplifier (LA) utilizing the second-order amplifier cells with active feedback is employed, which can perform peaking characteristics at high frequencies and increase the gain-bandwidth (GBW) product. Implemented in 0.18-

$\mu $

m CMOS process, the ORX achieves a measured transimpedance gain of 74 dB

$\Omega $

, a −3-dB bandwidth of 3.65 GHz, and an average input-referred current noise density of 11 pA/

$\sqrt {\mathrm {Hz}} $

. The total area occupied by the ORX is 2.686 mm², with a power consumption of 112.9 mW.

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一种用于高密度并行接口的11pa /Hz 5gb /s无电感光接收机

本文介绍了一种用于高密度并行接口应用的5gb /s无电感光接收器（ORX）。为了减小单通道的有源面积，减轻磁耦合效应，限制了片上电感的使用。通过采用可调级联码（RGC）跨阻放大器（TIA）和片上低差（LDO）稳压器，降低了高频噪声和片外噪声。采用带有源反馈的二阶放大器单元的限幅放大器（LA），可以在高频处实现峰值特性并提高增益带宽（GBW）积。ORX在0.18- $\mu $ m CMOS工艺中实现，测量的跨阻增益为74 dB $\Omega $， - 3 dB带宽为3.65 GHz，平均输入参考电流噪声密度为11 pA/ $\sqrt {\mathrm {Hz}} $。ORX的总占地面积为2.686 mm2，功耗为112.9 mW。

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 microwave and wireless technology letters

CiteScore

6.00

自引率

0.00%

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