A 2 × 112 Gb/s/pin Single-Ended Crosstalk Cancellation Transceiver With 31-dB Loss Compensation in 28-nm CMOS

This article presents a 112-Gb/s/pin single-ended four-level pulse-amplitude modulation (PAM-4) crosstalk cancellation (XTC) transceiver (TRX) designed to support data rates of up to 224 Gb/s through a pair of differential channels. The receiver (RX) employs a mismatch-mitigation single-ended-to-differential (S2D) converter for minimizing pseudo-differential mismatch. A four-tap feed-forward equalizer (FFE) using a multi-phase clock (MPC) technique is proposed to compensate for pre- and post-cursor inter-symbol interference (ISI) noise with low power consumption. The transmitter (TX) reconfigurable XTC technique is adopted to cancel mild crosstalk noise flexibly, while the multiple-input-multiple-output (MIMO)-XTC technique in the RX is used to eliminate severe inductive crosstalk noise robustly. Fabricated in 28-nm CMOS, the TRX achieves a bit error rate (BER) of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${\lt } 10{^{-10}}$ </tex-math></inline-formula> at 112-Gb/s PAM-4 transmission with a channel loss of 31 dB at the Nyquist frequency and an energy efficiency of 2.77 pJ/b.