A low-power gigabit Ethernet analog equalizer

An analog continuous time digitally adaptive cable equalizer for gigabit Ethernet has been designed in a 0.35 /spl mu/m CMOS process with a single 3 V supply. A three-stage opamp-based filter has been used while each stage has one pole and one zero consuming less than 3.8 mW. Each stage is able to amplify high frequency signals up to 11 dB.