[jitter-timing] Rise & Fall Times - Part 1
- From: "Jitter Timing Measurement Analysis Software" <jitlab@xxxxxxxxxxx>
- To: <jitter-timing@xxxxxxxxxxxxx>
- Date: Thu, 18 Sep 2003 22:40:38 -0600
Rise & Fall Times - Part 1
Definition of Rise Time:
Rise time is the difference between the time when the signal crosses a low
threshold to the time when the signal crosses the high threshold. It can be
absolute or percent.
Absolute Rise Time:
In absolute rise time, the low and high thresholds are fixed voltage levels
around the mid voltage level. For more info, visit
http://www.aubraux.com/jitter/meas-clock-rise-time.php
Percent Rise Time:
In percent rise time, the low and high thresholds are percent levels, and
are usually either 10% and 90% respectively or 20% and 80% respectively. The
percent levels are converted to absolute voltage levels at the time of
measurement by calculating percentages from the difference between the
starting voltage level and the final settled voltage level. For more info,
visit http://www.aubraux.com/jitter/meas-clock-rise-time-percent.php
Definition of Fall Time:
Fall time is the difference between the time when the signal crosses a high
threshold to the time when the signal crosses the low threshold. It can be
absolute or percent.
Absolute Fall Time:
In absolute fall time, the low and high thresholds are fixed voltage levels
around the mid voltage level. For more info, visit
http://www.aubraux.com/jitter/meas-clock-fall-time.php
Percent Fall Time:
In percent fall time, the low and high thresholds are percent levels, and
are usually either 10% and 90% respectively or 20% and 80% respectively. The
percent levels are converted to absolute voltage levels at the time of
measurement by calculating percentages from the difference between the
starting voltage level and the final settled voltage level. For more info,
visit http://www.aubraux.com/jitter/meas-clock-fall-time-percent.php
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- » [jitter-timing] Rise & Fall Times - Part 1
