Abstract
This chapter considers some of the subtleties of passive components including construction techniques of these devices and parasitic effects. It covers some details about resistors, capacitors, and inductors followed by an illustrative discussion of PC board layout issues. Surface-mount resistors come in a variety of sizes, ranging from “0201” size, through “0402” size, and all the way up to “2512” size. The resistor size numbers indicate the length and width of the resistor. The main advantage of carbon composition resistors is their ability to withstand high current transient surges. They do have the disadvantage of a high temperature coefficient of resistivity. Just as resistors suffer from parasitic components, so do capacitors. Printed circuit (PC) board layout and routing is a task that is sometimes left to the last minute in a design cycle. Doing a good PC board layout requires attention to many details, including: knowledge of where you want the high frequency, high current, or the sensitive circuitry to be; some information on component limitations; information on noise sources; real-world constraints, such as PC board form-factor and location of connectors and mounting holes; other constraints such as PC board design rules mandating minimum trace widths, trace-to-trace spacing, and the like.
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