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Simulating: Electrically long e.g. DDR3 / DDR4
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Classroom Contents
When a Signal Hits the End of a PCB Track - What Happens? - Reflections by Eric Bogatin
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- 1 Understanding reflections
- 2 Electrically Short vs. Long
- 3 The tool we are using explained
- 4 Simulating: Electrically short
- 5 Reflections on classic CMOS and standard board
- 6 Simulating: Electrically long e.g. DDR3 / DDR4
- 7 50 OHM impedance is not 50 OHM resistance
- 8 Simulating a buffer example
- 9 Why we get reflections
- 10 What happens when there is a reflection
- 11 Why reflection disappears
- 12 Frequency of ringing
- 13 How to eliminate reflections
- 14 Signal level change caused by termination
- 15 Source termination
