( english version )
Printed circuit board design ( 4 CFU )
Prof. Giovanni Franco
     Tel. 0521.905809 - Fax. 0521.905882           E-mail. frankie@ee.unipr.it

Finalità
This is project-oriented course and involves the design of PCBs (Printed Circuit Boards). It is focused on analog circuit principles especially linked to high-speed digital design. Signal propagation problems are studied; emphasis is placed on signal-integrity risk factors, tradeoffs in high-speed designs, PCB layout and stackup. The students will learn design techniques at the board levels as well as analysis techniques using the Spice simulator. The course culminates with a full development of a hardware and software project.

Programma
Fundamentals
Frequency and Time.
Time and Distance.
Lumped versus Distributed Systems: Length of Rising Edge.
Four Kinds of Reactance: Ordinary Capacitance, Ordinary Inductance, Mutual Capacitance, and Mutual Inductance.

Shortcomings of Point-to-Point Wiring
Distortion.
Electromagnetic Interference.
Crosstalk.

Transmission Lines
Infinite Uniform Transmission Line.
Effect of Source and Load Impedance.
Special Transmission Line Cases.
Line Impedance and Propagation Delay.

Terminations
“L” length Transmission Line.
End Terminators.
Source Terminators.
AC Biasing for End Terminators.
Resistor Selection.

Ground Planes and Layer Stacking
High-Speed Current Path.
Crosstalk in Solid and in Slotted Planes.
Crosstalk in Cross-Hatched Ground Planes.
Crosstalk with Power and Ground Fingers.
Rent Rule.
20H and 3W Rules.
How to Stack Printed Circuit Board Layers.

Power Supply Systems
Providing a Stable Voltage Reference.
Distributing Uniform Voltage.
Everyday Distribution Problems.
Choosing a Bypass Capacitor.

Signal Integrity
Ringing and Reflection.
Crosstalk.
Power and Ground Bounce.
Shunt and Guard Traces.
Clock Lines.
Routing Strategies.

Board Partitioning
Segmentation rules and their Connection.
Data Line Filters.
Connectors.
Backplanes.

Designing for Electromagnetic Compatibility
EMC and EMI Regulation.
Cabling, Grounding and Shielding.

Printed Circuit Board Technology
State of the Art.

Computer-Aided Design
Introduction to the Use of CADENCE-ORCAD.
The Design Process Flow: From Schematic to PCB.

Attività d'esercitazione
Exercises to the Use of CADENCE-ORCAD.
Realization and Testing of a Hardware Project in Through-Hole or SMT Technology.

Modalità d'esame
1. Classroom Test.
2. Final Hardware Project Report.

Propedeuticità
Physics AB, Electrical Engineer AB.

Testi consigliati
[1] “High Speed Digital Design: A Handbook of Black Magic”, Haward W. Johnson, Martin Graham. Prentice Hall, 1993. ISBN 0-13-395724-1
[2] “Grounding and Shielding Techniques in Instrumentation”, Ralph Morrison, 3rd Edition. John Wiley & Sons, 1986. ISBN 0-471-83805-5
[3] “Coombs’ Printed Circuit Handbook”, Clyde F. JR. Coombs, McGraw Hill, 2001. ISBN 0071350160
[4] "Noise Reduction Techniques in Electronic Systems", Henry W.Ott, Second Edition John Wiley & Sons, 1988 . ISBN 0-471-85068-3

 
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