Even low layer count PCBs might need 50 Ohm impedance. If you’re routing with 50 Ohm impedance and you need to design a 4-layer stackup, read our guide to see some standard constructions and PCB trace widths that will give 50 Ohm impedance.
0:00 Intro
0:34 A Few Considerations When Designing a PCB
1:00 Online Calculators Aren't That Bad
1:30 What Influences Trace Width?
2:30 Start with Your Fabricator...or else!
3:20 The Parameters that Determine Impedance
4:29 Trace Impedance Formulas
6:13 The IPC-2141 Formula
6:28 Wadell's Trace Impedance Formula
7:10 How to Determine Your Trace Impedance
9:54 Why Try CircuitMaker?
10:17 Outro
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