When a Signal Hits The End of a PCB Track – What happens? | Reflections by Eric Bogatin
Ringing caused by reflections can be fixed. What is happening and what to do? Explained by Eric Bogatin. Thank you Eric.
Chapters:
- 00:00Understanding reflections
- 01:06Electrically Short vs. Long
- 02:52The tool we are using explained
- 03:48Simulating: Electrically short
- 08:04Reflections on classic CMOS and standard board
- 10:41Simulating: Electrically long (e.g. DDR3 / DDR4)
- 15:1650 OHM impedance is not 50 OHM resistance
- 16:39Simulating a buffer example
- 18:32Why we get reflections
- 20:37What happens when there is a reflection
- 25:44Why reflection disappears
- 30:08Frequency of ringing
- 31:49How to eliminate reflections
- 35:37Signal level change caused by termination
- 39:25Source termination
