A 7Gb/s 9.3mW 2-Tap current-integrating DFE receiver

A 7Gb/s 2-tap current-integrating DFE implemented in a 90nm CMOS process is presented. Low power dissipation (9.3mW) is achieved by replacing resistively loaded analog current summers with resettable integrators. With 7Gb/s PRBS-7 data, the input sensitivity is 61mVpp-diff, and the DFE equalizes a 16-inch backplane with 45% horizontal eye opening. The DFE core (integrators, latches, clock buffers) occupies 85×65μm2. ©2007 IEEE.