Watch this animation to understand better how a signal is lost when travelling through a VIA.
Chapters:
00:00 What is this video about
01:14 Example 1: Single ended, no stitching VIA
06:08 Example 2: Single ended, 1 stitching VIA
10:17 Example 3: Single ended, 2 and 6 stitching VIAs
12:43 VIA Analyzer – How far we can place stitching VIAs and how many we need
16:50 Post layout analyzes
21:14 Changing VIA impedance
32:45 Example 4: Differential pair, no stitching VIA
36:10 Example 5: Differential pair, 2 stitching VIAs
48:18 1x VIA + 1x stitching VIA return current
55:20 About the software we were using + Prices
Welldone Blog 