CID Signal Integrity & High-Speed Design

Question 1

What causes signal reflections in high-speed PCB traces?

Accepted Answer

Impedance mismatches

Answer

Correct termination

Answer

Perfect grounding

Answer

Low capacitance

Question 2

Which parameter affects the speed of signal propagation in a PCB trace?

Accepted Answer

Dielectric constant of the substrate

Answer

Copper thickness

Answer

Trace width only

Answer

Solder mask color

Question 3

What is crosstalk in high-speed design?

Accepted Answer

Signal coupling between adjacent traces

Answer

Improved signal integrity

Answer

Enhanced grounding

Answer

Thermal conductivity

Question 4

Why is controlled impedance important in high-speed PCB design?

Accepted Answer

To reduce reflections and maintain signal integrity

Answer

To increase signal delay

Answer

To minimize copper usage

Answer

To increase cost

Question 5

Which component is used to terminate a transmission line to prevent reflections?

Accepted Answer

Resistor matching characteristic impedance

Answer

Capacitor

Answer

Inductor

Answer

Diode

Question 6

What does rise time of a signal affect in high-speed PCB design?

Accepted Answer

It affects high-frequency signal behavior

Answer

It reduces signal speed

Answer

It increases impedance

Answer

It improves power consumption

Question 7

How can designers reduce crosstalk in PCB layouts?

Accepted Answer

Increase spacing and use ground planes

Answer

Decrease trace width

Answer

Remove solder mask

Answer

Increase copper thickness

Question 8

What is the effect of via stubs on high-speed signals?

Accepted Answer

Cause signal reflections and degrade quality

Answer

Improve signal speed

Answer

Increase signal strength

Answer

Reduce signal attenuation

Question 9

Why is differential signaling used in high-speed PCBs?

Accepted Answer

To reduce noise and improve signal integrity

Answer

To increase power consumption

Answer

To reduce trace width

Answer

To increase EMI