A 5 Gbps 1.6 mW/G bps/CH Adaptive Crosstalk Cancellation Scheme With Reference-less Digital Calibration and Switched Termination Resistors for Single-Ended Parallel Interface

Abstract

A low power adaptive crosstalk cancellation for single-ended parallel interface is presented. A fast digital calibration which accurately detects the amount of crosstalk without a reference clock (reference-less) is proposed. To transfer calibration information from a receiver to a transmitter without additional channels, switched termination resistors (STR) are implemented. The reference-less adaptation and STR schemes achieve low power consumption and small area. A crosstalk compensator with simple structure is placed at transmitter-side, and it requires less design effort and low power. The proposed adaptive crosstalk cancellation scheme rapidly determines the optimum calibration point only during 4-cycle calibration time, and eliminates from 50% to 87.1% of the crosstalk-induced jitter (CIJ). It operates up to 5 Gbps consuming 1.6 mW/Gbps/CH in a 130 nm CMOS.