Via Effects on Signal Propagation in High Speed Transmission Lines

Abstract

With newer process and demand for increased system performance, clock speeds are getting faster and data transfer rates are increasing the acceleration of the system speed effects signal integrity. The reliable operation of system also becomes increasingly difficult To understand this problem extensive work on the matter is needed. The transmission lines are used in propagation systems to connect different devices. Data transmitted on from one device is carried by the transmission to another device [1]. This device can be a microprocessor or an application specific integrated circuit (ASIC). The data carrying capacity of the transmission lines is defined b its impedance. Transmission line's impedance not only depends on there own characteristics or parameters (material, thickness, dimension etc) but also on the characteristics of the features that exist in the environment surrounding them. The distribution of this impedance determines signal quality, which is best characterized by parameters such as noise, jitters, transmission delay or timing. It also embodies reflections, crosstalk and mismatches between drivers and receivers.