Abstract
We present a full-duplex 3 Gb/s PAM4 voltage-mode transmitter with an embedded 2-tap feed forward equalizer. In full-duplex mode, the transmitter employs an echo canceller to cancel the locally transmitted signal and recover the signal from the far-end. The transmitter achieves energy proportionality with output swings and equalizer coefficients. Fabricated in 65 nm Digital CMOS process, the transmitter transmits a maximum of 1 V peak-to-peak differential output swing. In full-duplex mode, the transmitter equalizes 2 m UTP cable and dissipates 37.3 mW at 3Gb/s with echo canceller in the receiver path. The power reduces to 18.3 mW while transmitting across a 9 m UTP cable in the half-duplex mode.
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