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JSSC 2013第3期RF & Wireless40nm

A 04-mWGbs Near-Ground Receiver Front-End With Replica Transconductance Terminat

本文介绍了一种40nm CMOS工艺下的低功耗接收前端,支持16Gb/s NRZ信号传输,功耗低于0.4mW/Gb/s。
40nm CMOS, 16Gb/s, <0.4mW/Gb/s
低功耗接收前端NRZ信号跨导校准均衡校准
创新点1:复制跨导阻抗校准(电路创新) - 通过引入复制跨导阻抗校准技术,精确匹配通道阻抗并补偿接收端输入负载效应,实现了在16-Gb/s高速数据传输下的稳定信号接收,解决了传统方法在高频下的阻抗失配问题。
创新点2:共模增益消除(电路创新) - 采用共模增益消除技术,有效抑制了共模噪声对差分信号的影响,提升了信号完整性,使系统在低共模电压(近地)环境下仍能保持高信噪比。
创新点3:原位均衡校准(系统创新) - 通过动态原位均衡校准技术,实时调整接收端均衡参数以补偿通道损耗(>15 dB Nyquist频率损耗),确保16-Gb/s数据速率下的可靠传输,同时功耗效率优于0.4 mW/Gb/s。
创新点4:近地低阻抗接收架构(系统创新) - 结合双向近地源串联终端(SST)接口与低阻抗设计,显著降低功耗并支持高带宽(16-Gb/s)NRZ信号传输,适用于内存链路等低电压场景。
Abstract
This paper describes a low-power receiver front-end in a bidirectional near-ground source-series terminated (SST) interface implemented in a 40-nm CMOS process, which supports low-common mode differential NRZ signaling up to 16-Gb/s data rates. The high-speed operation is enabled by utilizing a common-gate ampli fier stage with replica transconductance impedance calibration that accurately terminates the channel in the presence of receiver input loading. The near-ground low-impedance receiver als