Estimation of the Interconnect Jitter Performance by Frequency Domain Behaviour

Abstract

This paper describes a simple frequency-domain method for estimating the jitter performance of high-speed digital interconnects. For determination of the jitter at zero crossing of differential signals, 50% unit step response delay and group delays on at least two discrete frequencies, as well as the magnitude of the interconnect transfer function on those frequencies, are required The method is verified by comparing the frequency domain results with those given by transient simulation.