Listing ID #1022476
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Contact SupplierWe are offering voltage surge suppressors. Parasitic noise relates to the electrical noise (cmn and dmn) generated or transferred within a circuit by unexpected means. For example, switching semiconductors mounted on a pcb or heat sink with a thin insulator can contain small amounts of parasitic or stray capacitive elements.
These inadvertent stray capacitive elements at high frequencies—or with very fast switching pulse rise and fall times—facilitate the transfer or coupling of parasitic noise to other parts of the circuit or system. The same holds true for all electronic components.
For example, transformers have small amounts of capacitive elements between their windings that cannot be fully eliminated. Likewise, capacitors and printed-circuit traces have small inductive elements within them that show up at high frequencies and allow unwanted parasitic noise to be transferred from one point to another. Parasitic noise is one of the prime contributors to common- and differential-mode noise within switch-mode power supplies and many electronic oem products.