9.5.B. Power Supply Strategies

Try these first

1. 1.

   What is the purpose of decoupling capacitors?

   Hint

   Think about the role of capacitors in stabilizing voltage.

2. 2.

   Why are ferrite beads used in power supply circuits?

   Hint

   Consider the noise levels generated by digital circuits.

3. 3.

   What is the main purpose of using dedicated analog regulators?

   • To increase voltage
   • To reduce noise coupling
   • To stabilize temperature

   Hint

   Think about how the components interact with each other.

4. 4.

   True or False: Ferrite beads are used to filter out DC signals.

   • True
   • False

   Hint

   Remember what it means to isolate signals in a power supply context.

5. 5.

   Design a mixed-signal circuit that minimizes noise interference. Include LDOs, decoupling capacitors, and ferrite beads. Specify their placements and values.

   Hint

   Think about the layout and how each component's positioning affects noise.

6. 6.

   Analyze a scenario where an ADC's performance decreases due to power noise. Describe how to diagnose and implement noise reduction techniques.

   Hint

   Identify not only the symptoms but also the potential solutions based on the strategies discussed.