By Jon Varteresian
Jon Varteresian is proprietor of JV organizations, a firm focusing on the layout and manufacture of revealed circuit forums. He deals a variety of advice and methods from his years of expertise that warrantly a soft and painless workstation board layout and fabrication technique utilizing his step-by-step method. various illustrations and pictures display every one step of the method. themes lined within the booklet comprise: issues of safety, schematic seize, circuit placement and routing, making published circuit forums, and plans for tasks. an in depth source checklist and word list also are provided.
*Gives a whole evaluate of the broadcast circuit board layout process
*Describes easy methods to produce published circuit forums in small amounts (ideal for prototypes), with an emphasis on safety
*Author is proprietor a firm focusing on the layout and manufacture of published circuit forums
Read or Download Fabricating Printed Circuit Boards (Demystifying Technology) PDF
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Extra resources for Fabricating Printed Circuit Boards (Demystifying Technology)
If the components are too close, the solder may flow from pad to pad and generate short circuits. 24 Basic Circuit Board Placement and Routing Considerations Special Placement Consideration: Decoupling Capacitors There is one type of component that appears in almost every type of design: the decoupling capacitor. ” These capacitors are located on the power input pins of nearly every type of active device. Their purpose in life is to absorb (or more correctly, shunt to ground) electrical noise which is generated in the active device.
There are good arguments for both sides of the case. , tin-plate the vias). This way I can use the via location as a test point when my design doesn’t work! Paste mask: If you are lucky enough to have your circuit boards stuffed at an assembly house, you will need a paste mask. Solder paste must be applied to all surface mount component pads before the board is sent through a solder re-flow or infrared oven. To do this, the assembly house needs a paste mask layer. The paste mask layer tells the fabrication house exactly where the paste needs to go.
Keep in mind that the shunt termination will dissipate power and load the logic gate that is driving the line. In some cases, a shunt termination may not be enough to reduce the ringing to acceptable levels. This is often true of high-speed clock lines. In these cases a series termination will usually reduce transmission line effects to tolerable lev els. The series termination is usually a small resistor (150 Ω typically) placed at the source of the signal. High-speed digital clocks are among the most difficult signals to route.