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Everything you need to know to understand impedance in PCB layout (and TDR). Clear and easy to understand explanation by Eric Bogatin Links: - Eric Bogatin: - Signal Integrity Academy (use FEDSI - 3 months free): - The video with Bert: - My server videos: Chapters: 00:00 What is this video about 00:49 What TDR is and what it does? 02:37 What is characteristic impedance 04:48 Why reflections are bad 10:54 Why do we use 50 ohm in pcb tracks? 15:28 Are lower impedance tracks more immune to noise? 23:45 Can you use any impedance for differential pairs? 27:10 What is difference between closely and loosely coupled diff impedance 36:03 Experimenting with TDR simulation 48:58 Measuring and explaining TDR on a simple pcb track 56:39 Can we do TDR on a real board? 1:02:13 Measuring and explaining TDR on a pcb track with different width 1:05:53 Answer: Why we sometimes remove ground under pads 1:07:49 Measuring a coaxial cable with TDR 1:14:51 Why you may need TDR are where it is used 1:19:00 Do we really need to care about small changes in impedance? When? ------------------------------------------------------ Would you like to support me? It’s simple: - Sign up for my Hardware design and PCB Layout online courses: - You can also support me through Patreon: - Or sign up for my Udemy course: It is much appreciated. Thank you, - Robert
