A 2V low-power CMOS 125Mbaud repeater architecture for UTP5 cables

A repeater has been developed for 125Mbaud twisted pair data communication with binary signal levels. The repeater includes an adaptive equalizer and a driver. This architecture operates from a 2V supply while consuming less than 6mA of current in the equalizer section and 12mA in the driver section. The active die area is less than 0.04mm²in a 0.21 µ digital CMOS process. For 100m UTP5 cable the jitter at the output of the repeater is less than 0.3UI peak to peak (including driver jitter).