AND9075 - Understanding Data Eye Diagram …

AND9075 /D. Understanding data Eye Diagram Methodology for Analyzing High Speed Digital Signals APPLICATION NOTE. Introduction time on horizontal axis. By repeating this construction over The data eye Diagram is a methodology to represent and many samples of the waveform, the resultant graph will analyze a high speed digital signal . The eye Diagram allows represent the average statistics of the signal and will key parameters of the electrical quality of the signal to be resemble an eye. The eye opening corresponds to one bit quickly visualized and determined. The data eye Diagram is period and is typically called the Unit Interval (UI) width of constructed from a digital waveform by folding the parts of the eye Diagram . An ideal digital waveform with sharp rise the waveform corresponding to each individual bit into and fall times and constant amplitude will have an eye a single graph with signal amplitude on the vertical axis and Diagram as shown in Figure 1 below.

The quality of a high speed digital signal can be quickly determined by using a compliance mask overlay on the eye diagram display. A typical mask includes both time and amplitude limits. An eye diagram with compliance masks is shown in Figure 6 below. Figure 6. Eye Diagram with Compliance Mask In the above diagram, the gray block areas represent

Tags:

  Using, Data, Quality, Understanding, Signal, Diagrams, Understanding data eye diagram

Information