Controlled impedance is not science fiction… Especially when you know how to calculate your controlled impedance traces. But, do you? Open our free Impedance Calculator – which will help you answer some of the following questions – and get ready to take the quiz!

Results Congratulations, it looks like you know a lot about controlled impedance! But maybe you can still learn a few things by downloading our ControlledImpedance Design Guide? Ouch, it looks like you still have a lot to learn about controlled impedance. Download our Design Guide now and become a master in controlled impedance! next #1. In any stack-up, what does the dielectric constant of a PCB material depend on? Parameters like the percentage of resin content and the dielectric constants of resin and glass Parameters like the dielectric height and the propagation delay Parameters like the inductance and the capacitance next #2. Which material has a dielectric constant value of 4? 370HR FastRise27 P95 Polyimide next #3. What is the differential impedance for an Ethernet interface? 90 ohms +/-15% 95 ohms +/-15% 100 ohms +/-15% next #4. What will be the single-ended impedance of a 5-mil wide and 1.7-mil thick trace that has a dielectric height of 4 mils and a dielectric constant of 4.15? ? Clue: Impedance Calculator at https://www.protoexpress.com/user/registerHdi.jsp 50 ohms +/- 10% 60 ohms +/- 10% 70 ohms +/- 10% next #5. What should be the trace width of a 1.4-mil thick single-ended stripline which has 4-mil dielectric heights, dielectric constants of 4.15, and a 45-ohm impedance? ? Clue: Impedance Calculator at https://www.protoexpress.com/user/registerHdi.jsp 7 mils 5 mils 3 mils next #6. What is the single-ended impedance for a USB 2.0 signals interface? 50 ohms +/- 15% 90 ohms +/- 15% Non applicable next #7. What should be the trace width of a 1.7-mil thick single-ended microstrip which has a 3.8-mil dielectric height, a 57-ohm impedance, and use NP175 material? ? Clue: Impedance Calculator at https://www.protoexpress.com/user/registerHdi.jsp 5 mils 7 mils 8 mils next #8. What is the differential impedance for an analogue VGA interface? 75 ohms +/- 15% 90 ohms +/- 15% Non applicable next #9. What material should you not use if you want a dielectric constant of 3.5? Megtron6 (R-5775) FastRise27 N4000-13EP finish

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