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An IC Solution to EMI Reduction in LVDS Interface

Authored on: Dec 3, 2008

Technical Paper / Application Note

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The Low Voltage Differential Signaling (LVDS) interface is used in numerous product applications for transferring large amounts of data between system components. LCDs and Thin-Film Transistor (TFT) panels, for example, employ LVDS interfaces to carry display data. Since maintaining synchronization of the LVDS clock and data paths is essential for good picture quality in these displays, traditional spread spectrum electromagnetic interference (EMI) reduction methods, which have the potential for misalignment of the paths, must be avoided. As a result, product engineers and manufacturers customarily try to satisfy industry and/or government EMI regulations using traditional passive methods such as ferrite beads, conductive foam and resistors. In addition to increasing production time and raising costs, these methods can be unreliable and are often unsuccessful at lowering EMI to sufficient levels.

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