Book description
The Plain-English Guide to Electronics and Current Flow for Every PCB Designer
Today, PCB designers must deal with issues such as crosstalk and EMI-–issues that were once associated only with components. This requires electronics knowledge that many PCB designers never gain through formal training. In PCB Currents, renowned PCB designer Douglas Brooks teaches these essentials descriptively, in plain English, with as little reliance on mathematics as possible. Building on his widely praised seminars, Brooks explains what current is, how it flows, and how it reacts. He begins by reviewing the nature of current, and then explains current flow in basic circuits, discusses sources that supply and drive current, and addresses the unique problems associated with current on PCBs. Brooks concludes by thoroughly illuminating signal integrity issues caused by current flow. He offers practical design solutions for each common type of problem, as well as for complex challenges involving very high frequency harmonics and very short wavelengths.
Coverage includes
• Current: its fundamental nature, basic definitions, and key concepts
• Five fundamental laws of current, including Kirchoff’s law and Ohm’s law
• Basic circuit concepts: resistive circuits, reactive circuits, and impedance
• Voltage and current sources: Where electrons come from and why they move
• Current-related PCB issues: temperature, transmission lines, reflections, coupled currents, power distribution, skin effect, dielectric losses, and vias
• Solutions for signal integrity issues caused by current flow, from on-board inductance and apparent resistance changes to more complex problems
The text is written to be accessible and valuable for PCB designers at all levels of experience, whether they have engineering training or not.
Table of contents
- About This eBook
- Title Page
- Copyright Page
- Dedication Page
- Contents
- Preface
- Acknowledgments
- About the Author
- Part I: The Nature of Current
-
Part II: Current Flow in Basic Circuits
- 4. Resistive Circuits
-
5. Reactive Circuits: Capacitors and Capacitance
- 5.1. The Nature of Capacitance
- 5.2. Definition of Capacitance
- 5.3. Current “through” a Capacitor
- 5.4. AC Current “through” a Capacitor
- 5.5. Displacement Current
- 5.6. Ohm’s Law for Capacitance
- 5.7. Plot of Capacitive Reactance versus Frequency
- 5.8. Phase Shift for Capacitance
- 5.9. How Capacitors Combine
- 5.10. Power Dissipated in a Capacitor
- 5.11. Formula for Capacitance
-
6. Reactive Circuits: Inductors and Inductance
- 6.1. The Nature of Inductance
- 6.2. Definition of Inductance
- 6.3. DC Current “through” an Inductor
- 6.4. AC Current “through” an Inductor
- 6.5. Ohm’s Law for Inductance
- 6.6. Plot of Inductive Reactance versus Frequency
- 6.7. Phase Shift for Inductance
- 6.8. How Inductors Combine
- 6.9. Power Dissipated in an Inductor
- 6.10. General Equation for Inductance
- 6.11. Skin Effect
- 7. Reactive Circuits: Resonance
- 8. Impedance
- 9. Real Components and Parasitics
- 10. Time Constants and Filters
- 11. Transformers
- 12. Differential Current Flow
- 13. Semiconductors
- Part III: Voltage and Current Sources
-
Part IV: Current Flow on Circuit Boards
- 15. Where Do Currents Flow on Circuit Boards?
- 16. Current and Trace Temperatures
- 17. Current Reflections
- 18. Coupled Currents/EMI/Crosstalk
- 19. Current Distribution and Bypass Capacitors
- 20. Frequency-Variable Resistance and Lossy Transmission Lines
- 21. Currents and Vias
- 22. Current and Signal Integrity
- Appendices
- Index
Product information
- Title: PCB Currents: How They Flow, How They React
- Author(s):
- Release date: May 2013
- Publisher(s): Pearson
- ISBN: 9780133415353
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