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PCB clone

PCB Circuit Properties

  Time:2012-06-01 11:41

Each trace on the PCB consist of a flat, narrow part of the copper foil that remains after etching.The resistance,determined by width and thickness, of the traces must be sufficiently loww for the current the conductor will carry.Power and ground traces may need to be wider than signal traces.In a multi-layer board one entire layer may be mostly solid copper to act as a ground plane for shielding and power return. For microwave circuits, transmission lines can be laid out in the form of stripline and microstrip with carefully controlled dimentions to assure a consistent impedance. In radio-frequency and fast switching circuits the inductance and capacitance of the printed circuit board conductors become significant circuit elements,usually undesired; but they can be used as a deliberate part of the circuit design, obviating the need for additional discrete components.