Tuesday, June 05, 2007

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

Electrical ground looks simple on a schematic, but circuit performance is dictated by the PCB layout. 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 ground moves, performance suffers and the system radiates EMI. An understanding of ground noise can provide a sense for reducing the problem.

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