1. HSDSL, Technion Winter 2008 Characterization Presentation on: Skew And Jitter Generating And Measuring System For High Speed Experiments Undergraduate Project By: Bassel Massad Wasseem Zaher 22th November 2007

2. Motivation Measuring Results A part of the experiments deals with Skew and Jitter Phenomena  Our Part… Source Previous Project: 1ns Pulse Width Over 10ns/100ns Period Experiments Variety

3. Our Mission 1.Skew Generating System 2.Skew Measuring System 3.Jitter Generating System 4.Jitter Measuring System

4. The System- Bird Eye Source Power supplier Controller Generating System Mission 1&3 Measuring System Mission 2&4 Skew Jitter Reference

5. Skew- Definition  sec  Signal Skewed Signal

6. Skew- Generating System (1) The Idea: Delay is obtained by choosing one of different physical routes. First planned solution:

7. Controller Basic Delay  One Increment Skew- Generating System (2) Available candidates in Market: Why Better This Way? A number of 2  1 Multiplexers Instead of one B I G Multiplexer. Skew - ECL Programmable Delay Chip (MC100EP195B of ON Semiconductor) -Dual Channel Programmable Clock/Data Delay (NB6L295 of ON Semiconductor)

8. Skew- Measuring System  Idea: A system displaying two inputs. Peak-to-peak measurement. Possible solution, Available in HSDSL: Oscilloscope by Agilent 54642A Features: - 500MHz  Our maximum freq is 100MHz (10nsec period) - 2G Sample/sec  0.5nsec increments. - Two-channel  Generating system’s two outputs: “skew” and “reference”.

9. Jitter- Definition  Movie starts at 20:00. I am waiting for my girlfriend.  She might come at 19:55, 19:59:53, 20:02…20:05  Never at 20:00:00:0000 ?  She comes with ±5 minutes Jitter.  Our jitter refers to change as a specific (choosable) function. Jitter Wanted (ideal) Signal Possible Real Signals Time [sec] Signal [Volt]

10. Jitter- Generating System Source Controller Clock Function Generator Skew Generating System Jitter Slide 7! Available. Needs more research…

11. Jitter- Measuring System  Many measurements are needed. 1sec?  Time inaccuracy percentage, comparing to reference  Eye diagram?

12. Eye Diagram (1) Ingredients:  A wanted signal  Signal displayer (Oscilloscope- for example) Recipe:  Display a rising/falling edge image of the wanted signal  Display an image of its inversion  Keep looking for a long time

13. Eye Diagram (2) + One period of the signal One period of the inverted signal Time  ∞ + Time scale Jitter Voltage scale Jitter

14. Time Table Until Middle Presentation (5-6 Weeks from 22/Nov):  Final decision regarding time delay components- Deadline: 29/Nov.  Jitter Generating System: Finding suitable function generator- Deadline: 6/Dec.  Jitter Measuring system, Definition: Deadline: 13/Dec.  Final decision regarding power source: Deadline: 20/Dec.  Controller design: 3/Jan (Happy New Year)  Midterm Presentation: