A 10Gb/s 10mm on-chip serial link in 65nm CMOS featuring a half-rate time-based decision feedback equalizer

An all-digital 2-tap half-rate time-based decision feedback equalizer (TB-DFE) was demonstrated on a 10mm on-chip serial link. Implemented in a 65nm GP technology, the transmitter and receiver achieve an energy-efficiency of 31.9 and 45.3 fJ/b/mm, respectively, at a data rate of 10Gb/s. A Bit Error Rate (BER) less than 10^-12 was verified for an eye width of 0.43 Unit Interval (UI) using an in-situ BER monitor.