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Reducing Ground Bounce in DC-to-DC Converters—Some Grounding Essentials

Authored on: Oct 12, 2007 by Jeff Barrow

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Electrical ground looks simple on a schematic; unfortunately, the actual performance of a circuit is dictated by its printed circuit-board (PCB) layout. What's more, ground-node analysis is difficult, especially for DC-to-DC converters, such as buck and boost circuits, which pound the ground node with large, fast-changing currents. When the ground node moves, system performance suffers and the system radiates EMI. But a well-"grounded" understanding of the physics of ground noise can provide an intuitive sense for reducing the problem.

Reproduced with the permission of Analog Devices, Inc.

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