Controlled Impedance Quiz | Sierra Circuits Blog

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Congratulations, it looks like you know a lot about controlled impedance! But maybe you can still learn a few things by downloading our Controlled Impedance 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!

#1 What is controlled impedance?

It is the characteristic impedance of a transmission line formed by a PCB trace and its associated reference planes.

It is a phenomenon by which a signal transmitted on one circuit of a transmission system creates an undesired effect.

It is the alteration of the waveform of an information-bearing signal.

#2 In which unit is controlled impedance measured?

Ampere

Volt

Ohm

#3 At high frequencies, what is likely to happen if the impedance varies from one point to another on the signal trace trajectory?

The signal will be undistorted by the time it reaches the receiver side.

It will improve the signal integrity on the return path conductor.

There will be a signal reflection causing distortion.

#4 What is the standard tolerance for controlled impedance?

10%

15%

#5 What affects impedance?

The height of the dielectric layer between the signal trace and the reference plane.

The width and the thickness of the signal trace.

All the answers above.

#6 What does the percentage of the resin content have a great impact on?

The final thickness and the dielectric constant.

The percentage of the copper in the conducting layers.

The bonding material between two core laminates.

#7 What is a good design practice for controlled impedance?

The spacing between the two traces of a differential pair should be more than twice the width of the traces.

The spacing between the two traces of a differential pair should not be more than twice the width of the traces.

The spacing between the two traces of a differential pair should not be more than the width of the traces.

#8 Which of the following is the best way to route differential pairs when designing for controlled impedance?

#9 Where should you place components and vias when designing for controlled impedance?

On the side of differential pairs.

Between differential pairs with a spacing of more than five times the width of the traces.

Between differential pairs with the signals routed symmetrically around the components and the vias.

#10 Which of the following is a single-ended stripline?

finish