A 0.13/spl mu/m CMOS four-channel ADSL2+ analog front-end for CO applications with 75mW per channel

An analog-front-end design including the power-management circuits to achieve an SoC ADSL CPE modem solution is presented. The integrated AFE with less than 2nV//spl radic/Hz input referred noise, dynamically adaptive hybrid and combination of the analog and digital filtering provides a single-chip solution.