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PCB Currents: How They Flow, How They React by Douglas Brooks

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15. Where Do Currents Flow on Circuit Boards?

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15.1. Signal Currents

The principles covered in the previous parts of this book apply to almost all electronic circuits. When electronic systems are created, they are usually formed by a variety of circuits and subsystems, each created for very specific circumstances. Then these circuits are somehow assembled and/or combined into a larger system. The vast majority of them are assembled and combined on printed circuit boards (PCBs) or other subassemblies that are then combined on PCBs. This is not universally true, but it almost always is. Therefore, it is not inappropriate for a book such as this ...

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