Lecture Notes - Power Supply Circuits

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Understanding Nanotechnology

Lecture Notes - Chapter 11

Power Supply Circuits

(These Lecture Notes are for courses using the book the Complete Electronics Self-Teaching Guide with Projects. Instructors of courses using that text are permitted to use these Lecture Notes as-is or adapt them for their use).

Diodes in AC Circuits produce Pulsating DC
- Review the ability of diodes to pass current in only one direction.
- Discuss a simple circuit consisting of a diode and a resistor in series (figure 11.3).
- Discuss the output signal for the circuit shown in figure 11.3 (figure 11.8).
- Introduce the term: recitification.
- Introduce the term: half-wave rectifier (figure 11.11
  - A half wave rectifier converts an AC input signal to a pulsed DC output signal.
- Introduce the term: full-wave rectifier (figure 11.15)
- Discuss the output of a full-wave rectifier (figure 11.16)
- Introduce the term: out of phase (figure 10.4).
- Introduce the term: bridge rectifier (figure 11.17)
- Discuss the flow of current through the bridge rectifier (figure 11.18 and 11.19)
Project 11.1: The Full-Wave Rectifier
- Discuss the objective of the project.
- Review the circuit diagram (figure 11.21 and 11.22).
- Review the test setup (figure 11.24).
Level DC (Smoothing Pulsating DC)

Discuss the sections of a power supply (figure 11.31).
Introduce the term: AC ripple.
- The function of the smoothing section of a power supply is to take the pulsating DC and convert it to a pure DC with as little AC ripple as possible (figure 11.32)
Discuss the effect of capacitor C₁ on the pulsating DC signal (figure 11-38 and 11-39).
Discuss the calculations to determine the value of R₁.
Discuss the calculations to determine the value of C₁.
Discuss the calculations to determine the value of C₂.
Discuss the calculations to determine the amount of AC ripple.

This page includes material extracted, by permission of the publisher, Wiley Publishing, from Complete Electronics Self-Teaching Guide with Projects, ISBN: 9781118217320.