Gain-phase co-equalization for widely-used high-speed cables

Based on observation that widely-used high-speed cables have minimum-phase-like characteristics, we developed a minimum-phase equalizer, which is optimal for such cables. An analog 2/sup nd/-order derivative equalizer was employed, and our analysis showed positive coefficients are needed to make it minimum-phase. Since the equalizer is minimum-phase, phase is automatically equalized when gain is equalized enough. The equalizer was implemented in 0.11/spl mu/m CMOS technology, and measurement showed BER < 10/sup -12/ with a 40m AWG24 InfiniBand cable at 3.125Gbaud.