Jitter Measurement And Separation Based On Histogram

With the data rates exceeding GHz, as well as the power voltage's shrinking for reducing power consumption, the ratio of the jitter in data rates is becoming larger and larger. Any timing error is likely to impact on the whole digital system. The jitter has become a key factor limiting the digital system performance.To successfully design the high-speed system and meet the reliable performance of the system, engineers must track and analyze the sources of the jitter, and effectively separate the causes of jitter. Only in this way, we can reduce the jitter of the system and achieve optimal digital system.In the article, it introduces the different jitter test technologies, which have emerged in the market recently; the technologies are used in different equipments, such as error analyzer, real-time oscilloscope, time interval analyzer, and other sampling oscilloscopes. Besides, the article compares two current data measurement solutions commonly used: time interval measurement and time interval error measurement, and based on the time interval measurement hardware, we have developed a software over the jitter separation and analysis by VC. In addition, this paper focuses on the tail-fit technic of the jitter analysis in the statistical domain, and verifies the technic with the mainstream jitter analyzers. The results proved that the program can well do the separation and analysis of the jitter, and then guide the engineers to improve the design to access to high-performance of the system.Given the limitations of the time interval measurement, the program focused on the jitter analysis and separation of the clock, a key part of digital systems. In addition, the tail-fit technic can also be used in the data jitter analysis combined with data acquisition hardware.