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该论文提出了一种16端口的10GBASE-T发射机与混合电路，采用高度相关的电流镜放大器，通过输出上升时间控制和高CMRR实现一阶线性和非线性回波消除，满足IEEE 802.3an和FCC Class-A规范，并可扩展至48端口。
David Nguyen, Hiok-Tiaq Ng, Ramin Shirani Aquantia, Milpitas, CA High-density 48-port network switches demand very power-efficient, small form-factor quad PHYs which comply with the IEEE 802.3an transmit PSD and return-loss requirements on the one hand and meet the FCC Class-A specifications on the other hand. We present a 10GBase-T transmitter and hybrid that uses a highly correlated current-mirroring amplifier with output rise time control and high CMRR to perform a first-order linear and non-linear echo cancellation while enabling the design of 48-port FCC compliant network switches. Experimental results over the 400MHz bandwidth exhibit a transmitter linearity of >57dBc as well as a residual linear echo and distortion of -28dBc and 76dBc, respectively. Implemented in a 40nm CMOS technology, the transmitter plus hybrid consumes 200mW power and occupies 0.5mm2. Full-duplex operation over 100m UTP cable defined by the IEEE 802.3an standard requires a highly linear transmitter and echo
Friedel Gerfers, Ramin Farjad, Michael Brown, Ahmad Tavakoli,