9.4. Noise Coupling Mechanisms

Try these first

1. 1.

   What is capacitive coupling?

   Hint

   Think about how static electricity works.

2. 2.

   Name one effect of inductive coupling.

   Hint

   Consider magnetic fields from wires.

3. 3.

   What is the primary contribution of capacitive coupling in mixed signal circuits?

   • Inducing Magnetic Fields
   • Voltage Fluctuations
   • Noise Transfer due to Capacitance
   • Signal Reflection

   Hint

   Think about what happens when lines are near each other.

4. 4.

   True or False: Inductive coupling can create significant noise in analog parts of mixed signal systems.

   • True
   • False

   Hint

   Consider what induced magnetic fields do.

5. 5.

   You are designing a mixed signal PCB, and you notice elevated noise levels on the analog outputs. Devise a strategy including all four noise coupling mechanisms discussed to mitigate this problem.

   Hint

   Consider how each mechanism uniquely impacts your design.

6. 6.

   Explain how you would test for power/ground bounce in a mixed signal circuit during development. What tools may be needed?

   Hint

   What key equipment is used for monitoring electrical signals in circuits?